Atomes, molécules, mole, masse molaire...(calculs variés)

Combien d'atomes retrouve-t-on dans une molécule de Ca₃(PO₄)₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans une molécule de Mg(CH₃COO)₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans une molécule de CH₃(CH₂)₂COOH ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans une molécule de [Fe(CN)₆]^3- ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans une molécule de (C₅H₅)₂TiCl₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans une molécule de Al(C₂H₅)₃ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans une molécule de (NH₄)₂CO₃ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans une molécule de Ca(OH)₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans une molécule de TiCl₄ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans une molécule de H₂SO₄ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans 1,0 g de H₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans 4,0 g de H₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans 96 g de molybdène ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans 1,0 g de H₂O ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans 1,0 microgramme de H₂O ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans 2,0 mol de H₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans 1,0 micromol de H₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans 0,010 mol de chrome ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans 1,7 mol de H₂O ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'atomes retrouve-t-on dans 25 mol de cobalt ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce Ca₃(PO₄)₂ et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce Mg(CH₃COO)₂ et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce CH₃(CH₂)₂COOH et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce [Fe(CN)₆]^3- et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce (C₅H₅)₂TiCl₂ et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce Al(C₂H₅)₃ et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce (NH₄)₂CO₃ et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce Ca(OH)₂ et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce TiCl₄ et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce H₂SO₄ et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce Na₂SO₄•10H₂O et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce CaCl₂•2H₂O et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce CuSO₄•5H₂O et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse molaire de l'espèce Ni(NO₃)₂•6H₂O et inscrivez la valeur avec une seule décimale.

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'électrons retrouve-t-on dans une molécule de H₂SO₄ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'électrons retrouve-t-on dans une molécule de HSO₄^- ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'électrons retrouve-t-on dans une molécule de SO₄^2- ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'électrons retrouve-t-on dans une molécule de NH₃ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'électrons retrouve-t-on dans une molécule de NH₄⁺ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'électrons retrouve-t-on dans une molécule de Al(OH)₄^- ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'électrons retrouve-t-on dans une molécule de Al(OH)₃ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'électrons retrouve-t-on dans une molécule de H₃O⁺ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'électrons retrouve-t-on dans une molécule de HNO₃ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien d'électrons retrouve-t-on dans une molécule de NO₃^- ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de protons retrouve-t-on dans une molécule de H₂SO₄ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de protons retrouve-t-on dans une molécule de HSO₄^- ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de protons retrouve-t-on dans une molécule de SO₄^2- ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de protons retrouve-t-on dans une molécule de NH₃ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de protons retrouve-t-on dans une molécule de NH₄⁺ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de protons retrouve-t-on dans une molécule de Al(OH)₄^- ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de protons retrouve-t-on dans une molécule de Al(OH)₃ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de protons retrouve-t-on dans une molécule de H₃O⁺ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de protons retrouve-t-on dans une molécule de HNO₃ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de protons retrouve-t-on dans une molécule de NO₃^- ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 0,0010 mol d'aluminium ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 0,0100 mol de calcium ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 0,10 mol de NH₄⁺ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 1,0 micromol de cuivre ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 1,0 micromol de H⁺ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 1,00 micromol de Cl^- ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 0,0010 mol de NaOH ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 10,0 micromol de plomb ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 0,0010 mol d'aluminium ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 0,0200 mol de HNO₃ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 1,20x10²⁴ atomes de zinc ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 1,20x10²⁴ atomes de plomb ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 2,0x10²³ atomes d'uranium ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

87
Fr
(223)

88
Ra
(226)

89
Ac
(227)

104
Rf
(261)

105
Db
(262)

106
Sg
(263)

107
Bh
(264)

108
Hs
(265)

109
Mt
(268)

110
Ds
(271)

111
Rg
(272)

112
Uub

113
Uut

114
Uuq

115
Uup

116
Uuh

58
Ce
140,116

59
Pr
140,907

60
Nd
144,24

61
Pm
(145)

62
Sm
150,36

63
Eu
151,964

64
Gd
157,25

65
Tb
158,925

66
Dy
162,500

67
Ho
164,930

68
Er
167,259

69
Tm
168,934

70
Yb
173,04

71
Lu
174,967

90
Th
232,038

91
Pa
231,036

92
U
238,029

93
Np
(237)

94
Pu
(244)

95
Am
(243)

96
Cm
(247)

97
Bk
(247)

98
Cf
(251)

99
Es
(252)

100
Fm
(257)

101
Md
(258)

102
No
(259)

103
Lr
(262)

Calculez la masse en g de 1,0x10¹⁵ atomes de palladium ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez la masse en g de 6,0x10¹² atomes d'argent ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 3,44x10²⁴ molécules de O₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 5,57x10³⁰ molécules de C₂H₆ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 1,33x10²⁶ molécules de Br₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 2,34x10²³ molécules de B₂H₆ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 7,76x10²³ molécules de CO ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 1,11x10²² atomes de potassium ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 2,5x10²⁵ atomes de silicium ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 2,0x10²¹ atomes de krypton ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 8,0x10²³ atomes de CO ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 4,5x10²⁴ atomes de CO ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 1,0 kg de fer ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 100 g de HCl ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans 100 g de KOH ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans dans 0,100 g de lithium ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Calculez le nombre de mol dans dans 1,0 g d'or ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de molécules retrouve-t-on dans 1,0 mol de diazote ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de molécules retrouve-t-on dans 10 mol de méthane (CH₄) ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de molécules retrouve-t-on dans 0,0010 mol de NaCl ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de molécules retrouve-t-on dans 5,0 mol de H₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de molécules retrouve-t-on dans 0,10 mol de dioxygène ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de molécules retrouve-t-on dans 10 g de S₈ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de molécules retrouve-t-on dans 100 g de H₂O ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de molécules retrouve-t-on dans 1,0 kg de HCl ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de molécules retrouve-t-on dans 10 g de O₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Combien de molécules retrouve-t-on dans 1,0 g de H₂ ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

La masse d'un proton équivaut à combien de fois celle d'un électron ?

2000 fois la masse d'un e^-
200 fois la masse d'un e^-
20000 fois la masse d'un e^-
20 fois la masse d'un e^-
équivaut à la masse d'un e^-

La masse d'un neutron équivaut à combien de fois celle d'un électron ?

2000 fois la masse d'un e^-
200 fois la masse d'un e^-
20000 fois la masse d'un e^-
20 fois la masse d'un e^-
équivaut à la masse d'un e^-

La masse d'un proton équivaut à combien de fois celle d'un neutron ?

équivaut à la masse d'un neutron
2 fois la masse d'un neutron
20 fois la masse d'un neutron
200 fois la masse d'un neutron
2000 fois la masse d'un neutron

Parmi les définitions suivantes, sélectionnez celle correspondant au nombre de masse (A).

Nombre de masse = nbre de protons + nbre de neutrons
Nombre de masse = nbre d'électrons + nbre de neutrons
Nombre de masse = nbre de protons + nbre d'électrons
Nombre de masse = nbre de protons + nbre de neutrons + nbre d'électrons
Nombre de masse = nbre de protons

Parmi les définitions suivantes, sélectionnez celle correspondant au numéro atomique (Z).

Numéro atomique = nbre de protons
Numéro atomique = nbre d'électrons + nbre de neutrons
Numéro atomique = nbre de protons + nbre d'électrons
Numéro atomique = nbre de protons + nbre de neutrons + nbre d'électrons
Numéro atomique = nbre de protons + nbre de neutrons

Sélectionnez la bonne signification du chiffre 32 dans le symbole de l'élément soufre suivant ³²S.

Nombre de protons
Nombre de protons + neutrons
Nombre d'électrons
Nombre de neutrons
Aucune de ces réponses

Sélectionnez la bonne signification du chiffre 16 dans le symbole de l'élément soufre suivant ₁₆S.

Numéro de protons
Nombre de protons + neutrons
Nombre d'électrons
Nombre de neutrons
Aucune de ces réponses

Sélectionnez la bonne signification du chiffre 112 dans le symbole de l'élément cadmium suivant ¹¹²Cd.

Nombre de protons
Nombre de protons + neutrons
Nombre d'électrons
Nombre de neutrons
Aucune de ces réponses

Sélectionnez la bonne signification du chiffre 48 dans le symbole de l'élément cadmium suivant ₄₈Cd.

Numéro de protons
Nombre de protons + neutrons
Nombre d'électrons
Nombre de neutrons
Aucune de ces réponses

Un échantillon d'oxyde de chrome (Cr_xO_y) pur ayant une masse de 3,741 g renferme 2,560 g de chrome. Déterminez sa formule chimique.
(inscrivez la formule sans tenir compte du format des indices)

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Un échantillon de sulfure de cuivre (Cu_xS_y) pur renferme 1,472 g de cuivre. Sachant que la masse de cet échantillon est de 1,843 g, déterminez sa formule chimique.
(inscrivez la formule sans tenir compte du format des indices)

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

L'analyse d'un composé formé d'oxygène et d'un élément inconnu X a révélé que 0,743 g de l'élément X était combiné à 0,115 g d'oxygène dans ce composé. En admettant que la formule de ce composé est XO₂, quel est le numéro atomique de l'élément X ?

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Un hydrocarbure (C_xH_y) renferme 88,2% en masse de carbone. Sachant que chaque molécule de cet hydrocarbure contient 5 atomes de carbone, déterminez sa formule chimique.
(inscrivez la formule sans tenir compte du format des indices)

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Déterminez la formule empirique d'un composé dont la composition centésimale est la suivante :

   C = 63,10%
   H = 12,36%
   N = 24,54%
(inscrivez la formule sans tenir compte du format des indices)

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Déterminez la formule empirique d'un composé dont la composition centésimale est la suivante :

   Cu = 34,62%
   Fe = 30,43%
   S = 34,95%
(inscrivez la formule sans tenir compte du format des indices)

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Déterminez la formule empirique d'un composé dont la composition centésimale est la suivante :

   K = 24,75%
   Mn = 34,77%
   O = 40,51%
(inscrivez la formule sans tenir compte du format des indices)

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Déterminez la formule empirique d'un composé dont la composition centésimale est la suivante :

   C = 40,00%
   H = 6,71%
   O = 53,29%
(inscrivez la formule sans tenir compte du format des indices)

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)

Déterminez la formule empirique d'un composé dont la composition centésimale est la suivante :

   C = 40,92%
   H = 6,58%
   O = 54,54%
(inscrivez la formule sans tenir compte du format des indices)

1
H
1,0079

2
He
4,0026

3
Li
6,941

4
Be
9,0122

5
B
10,811

6
C
12,011

7
N
14,0067

8
O
15,9994

9
F
18,9984

10
Ne
20,1797

11
Na
22,9898

12
Mg
24,3050

13
Al
26,9815

14
Si
28,0855

15
P
30,9738

16
S
32,066

17
Cl
35,453

18
Ar
39,948

19
K
39,0983

20
Ca
40,078

21
Sc
44,9559

22
Ti
47,867

23
V
50,9415

24
Cr
51,9961

25
Mn
54,9380

26
Fe
55,845

27
Co
58,9332

28
Ni
58,6934

29
Cu
63,546

30
Zn
65,38

31
Ga
69,723

32
Ge
72,59

33
As
74,9216

34
Se
78,96

35
Br
79,904

36
Kr
83,798

37
Rb
85,4678

38
Sr
87,62

39
Y
88,9058

40
Zr
91,224

41
Nb
92,9064

42
Mo
95,94

43
Tc
(98)

44
Ru
101,07

45
Rh
102,906

46
Pd
106,42

47
Ag
107,868

48
Cd
112,411

49
In
114,818

50
Sn
118,710

51
Sb
121,760

52
Te
127,60

53
I
126,905

54
Xe
131,293

55
Cs
132,905

56
Ba
137,327

57
La
138,906

72
Hf
178,49

73
Ta
180,948

74
W
183,84

75
Re
186,207

76
Os
190,23

77
Ir
192,217

78
Pt
195,078

79
Au
196,967

80
Hg
200,59

81
Tl
204,383

82
Pb
207,2

83
Bi
208,980

84
Po
(209)

85
At
(210)

86
Rn
(222)