How many oxygen atoms are present in MgSO4 • 7H2O?
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Transcript How many oxygen atoms are present in MgSO4 • 7H2O?
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. Noneof 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. Noneof 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-