_
1. There are ____electrons and ___ protons in a Pb4+ ion
a.
b.
c.
d.
e.
86, 82
82, 78
78, 82
86, 86
82, 86
2. On a distant planet, carbon has two naturally occurring isotopes 12C and 13C with masses of 12.00000 u and
13.003 u. If the atomic mass of carbon on the planet is measured to be 12.9 u , calculate the percent
abundance of the 12C isotope
a. 95.2 %
b. 85.2 %
c. 89.7 %
d. 10.3 %
e. 14.1 %
3. What is the charge on the cation in the species FeCr2O7
a.
b.
c.
d.
e.
4.
-2
3
2
1
-1
Calculate
a.
b.
c.
d.
e.
(6.03 + 0.052133) / 0.1340
45.3891
45.4
45.389
45.39
45
5. What is the empirical formula for a compound containing 38.8% carbon, 16.2% hydrogen, and 45.1%
nitrogen?
a.
b.
c.
d.
e.
CH5N
CH4N
CH2N3
C2H10N2
CHN
6. J.J Thomsons’s experiment illustrated
a.
b.
c.
d.
e.
that atoms contain negatively charged particles
that E=mc2
that the nucleus of an atom is very small
that neutrons have zero charge
that neutrons have the same mass as protons
7. The chemical formula of disulfur decafluoride
a.
b.
c.
d.
e.
is ________
S2(FO3)10
(SO3)1F10
SF
S2F10
SF5
8. How may moles of oxygen are present in 12.1 grams of NaNO3
a.
b.
c.
d.
e.
0.142 mol
0.121 mol
1.00 mol
2.34 mol
0.427 mol
9. Which of the following is the largest length?
a.
b.
c.
d.
e.
0.0001 cm
0.001 km
0.100 mm
0.0001 m
1000. nm
10. Which of the following atoms contains the most neutrons?
a.
180
b.
c.
d.
4
e.
Ta
He
Li
109
Cd
7
235
U
11. What mass of NaNO3 contains 3.11 g of oxygen?
a.
b.
c.
d.
e.
0.111 g
2.91 g
1.77 g
16.5 g
5.51 g
12. If I were to count out 4.4 x 1021 molecules of water, H2O, how many grams of water would I have?
a.
b.
c.
d.
e.
0.0073
0.13 g
0.0013 g
1.0 g
18.01 g
13. The chemical formula for the compound formed between magnesium and the sulfite ion is
a.
b.
c.
d.
e.
MgS
Mg(SO3)2
MgSO3
Mg(SO4)2
MgSO4
14. The name of the species with the chemical formula HBrO4
chemical formula HClO3 is ____
a. perbromic acid, chlorous acid
b. hypobromic acid, chloric acid
c. hydrobromic acid, hydrochloric acid
d. perbromic acid, chloric acid
e. bromic acid, chlorous acid
15. Which is not a correct chemical formula?
a.
b.
c.
d.
e.
BaCl3
Ca3(PO4)2
MgSO4
NaC2H3O2
NaNO3
yd2 hr-1 into cm2s-1
0.00881 cm2s-1
221 cm2s-1
0.0126 cm2s-1
113 cm2s-1
79.1 cm2s-1
16. Convert 34.1
a.
b.
c.
d.
e.
17. The symbol corresponding to 109 is
a.
b.
c.
d.
T
n
G
p
is ____. The name of the species with the
e. M
18. Which of the following is a SI base unit?
a.
b.
c.
d.
e.
19.
newton
joule
pascal
second
volt
Two different isotopes of a given element always have ______
a.
b.
c.
d.
e.
the same number of neutrons
the same number of electrons
the same mass number
the same number of protons
the same charge
20. What is the molar mass of Fe2(SO4)3
a.
b.
c.
d.
e.
345.1 g/mol
399.9 g/mol
461.1 g/mol
390.1 g/mol
410.6 g/mol
21. Sulfur, S, is in group ___ of the periodic table. Argon, Ar, is in the ___ period of the periodic table
a.
b.
c.
d.
e.
II, third
II, fourth
VI, sixth
VII, fifth
VI, third
22. What is the mass percent of oxygen in NaNO3
a.
b.
c.
d.
e.
20.0 %
33.3 %
18.8 %
71.1 %
56.5 %
23. The chemical formula of aluminum phosphate is _____. The chemical formula of nitrous acid is _____
a.
b.
c.
d.
Al2(PO4)3 , HNO2
AlPO4 HNO2
Al3(PO4)2 , HNO3
Al3(PO4)2 , HNO2
e. AlPO4 , HNO3
24. Which one of the following contributes to the mass but does NOT contribute to the charge of an atom?
a.
b.
c.
d.
e.
protons
electrons
photons
cathode rays
neutrons
25. What is the mass of 1.21 moles NaNO3?
a.
b.
c.
d.
e.
84.99 g
64.0 g
70.2 g
107 g
103 g
_
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
C
D
C
B
A
A
D
E
B
E
E
B
C
D
A
E
C
D
D
B
E
E
B
E
E