How many oxygen atoms are present in MgSO4 • 7H2O?

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Chemistry, The Central Science, 10th edition
Theodore L. Brown; H. Eugene LeMay, Jr.;
and Bruce E. Bursten
Chapter 2
Atoms, Molecules, and Ions
Donna Narsavage Heald
Siena College
Loudonville, NY
 2006, Prentice Hall
If you have equal masses of the following
metals, which will have the largest
number of atoms?
1.
2.
3.
4.
5.
Pb, 207.2 g/mol
Au, 197 g/mol
Ag, 107.9 g/mol
Cu, 63.54 g/mol
Fe, 55.85 g/mol
If you have equal masses of the following
metals, which will have the largest
number of atoms?
1.
2.
3.
4.
5.
Pb, 207.2 g/mol
Au, 197 g/mol
Ag, 107.9 g/mol
Cu, 63.54 g/mol
Fe, 55.85 g/mol
The mass spectrum of chlorine is shown
below. How many different molar masses are
possible for Cl2?
1.
2.
3.
4.
5.
1
2
3
4
5
The mass spectrum of chlorine is shown
below. How many different molar masses are
possible for Cl2?
1.
2.
3.
4.
5.
1
2
3
4
5
Which molar mass will be most common
among Cl2 molecules?
1.
2.
3.
4.
5.
70 g/mol
71 g/mol
72 g/mol
73 g/mol
74 g/mol
Which molar mass will be most common
among Cl2 molecules?
1.
2.
3.
4.
5.
70 g/mol
71 g/mol
72 g/mol
73 g/mol
74 g/mol
Which of the following are have the same
number of electrons (isoelectronic)?
14
7
1.
19
9
2.
20
10
F
Ne
20
10
24
12
Mg

20
10 Ne

27
3
Al
13


5. Noneof the above


19
9
20
10
F
Ne
24
12
Ne
19
3. 9 F

4. 147 N 3

N 3
20
10

Ne
27
13
Al3



Mg
27
13
Al3
Which of the following are have the same
number of electrons (isoelectronic)?
14
7
1.
19
9
2.
20
10
F
Ne
20
10
24
12
Mg

20
10 Ne

27
3
Al
13


5. Noneof the above


19
9
20
10
F
Ne
24
12
Ne
19
3. 9 F

4. 147 N 3

N 3
20
10

Ne
27
13
Al3



Mg
27
13
Al3
Which combination is likely to produce an
ionic compound?
1.
2.
3.
4.
5.
C and H
S and Cl
Ca and F
Br and I
Xe and F
Which combination is likely to produce an
ionic compound?
1.
2.
3.
4.
5.
C and H
S and Cl
Ca and F
Br and I
Xe and F
What are the ions present in the compound
(NH4)2SO4 ?
1.
2.
3.
4.
5.
NH3, H2, and SO2
N3-, H+, S2-, O2NH42+ and SO4NH4+ and SO42(NH4+)2 and SO42-
What are the ions present in the compound
(NH4)2SO4 ?
1.
2.
3.
4.
5.
NH3, H2, and SO2
N3-, H+, S2-, O2NH42+ and SO4NH4+ and SO42(NH4+)2 and SO42-

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