Don’t pay any attention to number 26!
1.
Manganese makes up 1.3  10–4 percent by mass of the elements found in a normal healthy body. How many
grams of manganese would be found in the body of a person weighing 261 lb? (2.205 lb = 1 kg)
a)
0.75 g
b)
0.15 g
c)
15 g
d)
75 g
e)
1.5  10–4 g
Ans: b
Algorithm: Yes
Chapter/Section: 1.6
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: general concepts
Keyword 4: measurement
Keyword 5: factor label method
2.
In 1984, some drums of uranium hexafluoride were lost in the English Channel, which is known for its cold
water (about 15°C). The melting point of uranium hexafluoride is 148°F. In what physical state is the uranium
hexafluoride in these drums? (T °F = T°C  (9°F / 5°C) + 32°F)
a)
solid
b)
liquid
c)
gas
d)
a mixture of solid and liquid
e)
not enough information
Ans: a
Algorithm: Yes
Chapter/Section: 1.7
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: general concepts
Keyword 4: measurement
Keyword 5: SI unit
Keyword 6: temperature
3.
A freighter carrying a cargo of uranium hexafluoride sank in the English Channel in late August 1984. The
cargo of uranium hexafluoride weighed 2.251  108 kg and was contained in 30 drums, each containing 1.47 
106 L of UF6. What is the density (g/mL) of uranium hexafluoride?
a)
1.53 g/mL
b)
5.10 g/mL
c)
2.25 g/mL
d)
0.196 g/mL
e)
51.0 g/mL
Ans: b
Algorithm: Yes
Chapter/Section: 1.8
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: general concepts
Keyword 4: measurement
Keyword 5: SI unit
Keyword 6: density
4.
Which of the following pairs can be used to illustrate the law of multiple proportions?
a)
SO and SO2
b)
CO and CaCO3
c)
H2O and C12H22O11
d)
H2SO4 and H2S
e)
KCl and KClO2
Ans: a
Algorithm: No
Chapter/Section: 2.2
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: atomic theory of matter
5.
A sample of chemical X is found to contain 5.0 grams of oxygen, 10.0 grams of carbon, and 20.0 grams of
nitrogen. The law of definite proportion would predict that a 67 gram sample of chemical X should contain
how many grams of carbon?
a)
5.0 grams
b)
6.7 grams
c)
10. grams
d)
15 grams
e)
19 grams
Ans: e
Algorithm: Yes
Chapter/Section: 2.2
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: atomic theory of matter
Keyword 5: Dalton's atomic theory
6.
Rutherford's experiment was important because it showed that:
a)
Radioactive elements give off alpha particles.
b)
Gold foil can be made to be only a few atoms thick.
c)
A zinc sulfide screen scintillates when struck by a charged particle.
d)
The mass of the atom is uniformly distributed throughout the atom.
e)
An atom is mostly empty space.
Ans: e
Algorithm: No
Chapter/Section: 2.4
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: atomic theory of matter
Keyword 5: structure of the atom
Keyword 6: nuclear model of atom
7.
The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Rhenium-185 has in its
nucleus
a)
75 protons, 75 neutrons
b)
75 protons, 130 neutrons
c)
130 protons, 75 neutrons
d)
75 protons, 110 neutrons
e)
not enough information
Ans: d
Algorithm: No
Chapter/Section: 2.5
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: atomic theory of matter
Keyword 5: isotope
8.
Which of the following statements are true of uranium-238?
I.
Its chemical properties will be exactly like those of uranium-235.
II.
Its mass will be slightly different from that of an atom of uranium-235.
III. It will contain a different number of protons than an atom of uranium-235.
IV. It is more plentiful in nature than uranium-235.
a)
III, IV
b)
I, II, III
c)
I, II, IV
d)
II, III, IV
e)
all of these
Ans: c
Algorithm: No
Chapter/Section: 2.5
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: atomic theory of matter
Keyword 5: isotope
9.
Which of the following statements is true?
a)
Ions are formed by adding or removing protons or electrons.
b)
Scientists believe that solids are mostly open space.
c)
Heating water with a Bunsen burner results in a 2:1 mixture of hydrogen and oxygen gases.
d)
At least two of the above statements (A-C) are true.
e)
All of the statements (A-C) are false.
Ans: b
Algorithm: No
Chapter/Section: 2.5
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
10.
How many protons and electrons does the most stable ion for magnesium have?
# protons
# electrons
a)
10 p
12 e
b)
12 p
14 e
c)
14 p
12 e
d)
12 p
12 e
e)
12 p
10 e
Ans: e
Algorithm: Yes
Chapter/Section: 2.8
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: periodic table
Keyword 5: group
11.
You are given a compound with the formula MCl2, in which M is a metal. You are told that the metal ion has
25 electrons. What is the identity of the metal?
a)
Mn
b)
Al
c)
Cu
d)
Fe
e)
Co
Ans: e
Algorithm: Yes
Chapter/Section: 2.7
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: chemical substance
Keyword 5: chemical formula
Keyword 6: ionic substance
12.
The atomic mass of rhenium is 186.2. Given that 37.1% of natural rhenium is rhenium-185, what is the other
stable isotope?
183
a)
75 Re
b)
187
75
Re
c)
189
75
Re
d)
181
75
Re
190
75
Re
e)
Ans: b
Algorithm: No
Chapter/Section: 3.2
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: atomic theory of matter
Keyword 5: atomic weight
Keyword 6: mass spectroscopy
13.
Naturally occurring copper exists in two isotopic forms: 63Cu and 65Cu. The atomic mass of copper is 63.55
amu. What is the approximate natural abundance of 63Cu?
a)
63%
b)
90%
c)
70%
d)
50%
e)
30%
Ans: c
Algorithm: No
Chapter/Section: 3.2
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: atomic theory of matter
Keyword 5: atomic weight
Keyword 6: mass spectroscopy
14.
A sample of ammonia has a mass of 45.5 g. How many molecules are in this sample?
a)
2.67 molecules
b)
2.74  1025 molecules
c)
2.25  1023 molecules
d)
1.61  1024 molecules
e)
9.02  10–16 molecules
Ans: d
Algorithm: Yes
Chapter/Section: 3.4
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: mass and moles of substance
Keyword 5: mole
15.
Calculate the molar mass of calcium perchlorate.
a)
254.98 g/mol
b)
222.98 g/mol
c)
279.06 g/mol
d)
179.61 g/mol
e)
238.98 g/mol
Ans: e
Algorithm: Yes
Chapter/Section: 3.4
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: mass and moles of substance
Keyword 5: molecular weight
16.
Phosphoric acid can be prepared by reaction of sulfuric acid with “phosphate rock” according to the equation:
Ca3(PO4)2 + 3H2SO4  3CaSO4 + 2H3PO4
How many oxygen atoms are there in 3.80 ng of Ca3(PO4)2?
a)
7.38  1012
b)
2.95  1013
c)
1.83  1016
d)
5.90  1022
e)
5.90  1013
Ans: e
Algorithm: Yes
Chapter/Section: 3.4
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: mass and moles of substance
Keyword 5: mole
17.
What is the mass of a 6.267-mol sample of sodium hydroxide?
a)
40.00 g
b)
250.7 g
c)
150.4 g
d)
6.382 g
e)
0.1567 g
Ans: b
Algorithm: Yes
Chapter/Section: 3.4
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: mass and moles of substance
Keyword 5: mole
18.
How many atoms of hydrogen are present in 3.18 g of ammonia?
a)
1.12  1023
b)
6.33  1023
c)
5.74  1024
d)
3.37  1023
e)
4.65  1019
Ans: d
Algorithm: Yes
Chapter/Section: 3.4
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: mass and moles of substance
Keyword 5: mole
19.
A substance contains 35.0 g nitrogen, 5.05 g hydrogen, and 60.0 g of oxygen. How many grams of hydrogen
are there in a 179-g sample of this substance?
a)
9.03 g
b)
897 g
c)
18.1 g
d)
5.05 g
e)
35.4 g
Ans: a
Algorithm: Yes
Chapter/Section: 3.6
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: determining chemical formulas
20.
How many grams of potassium are in 21.9 g of K2CrO7?
a)
3.54 g
b)
1.120 g
c)
7.07 g
d)
78.2 g
e)
43.8 g
Ans: c
Algorithm: Yes
Chapter/Section: 3.6
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: determining chemical formulas
21.
Chloric acid, HClO3, contains what percent hydrogen by mass?
a)
1.92%
b)
20.0%
c)
18.9%
d)
1.19%
e)
4.20%
Ans: d
Algorithm: Yes
Chapter/Section: 3.6
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: determining chemical formulas
22.
A mixture of KCl and KNO3 is 44.20% potassium by mass. The percentage of KCl in the mixture is closest to
a)
40%
b)
50%
c)
60%
d)
70%
e)
80%
Ans: a
Algorithm: No
Chapter/Section: 3.6
Difficulty: Difficult
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: determining chemical formulas
Keyword 5: mass percentage
23.
A substance contains 23.0 g sodium, 27.0 g aluminum, and 114 g fluorine. How many grams of sodium are
there in a 119-g sample of the substance?
a)
5.17 g
b)
23.0 g
c)
16.7 g
d)
119 g
e)
none of these
Ans: c
Algorithm: Yes
Chapter/Section: 3.6
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: determining chemical formulas
Keyword 5: mass percentage
24.
An oxide of iron has the formula Fe3O4. What mass percent of iron does it contain?
a)
0.72%
b)
28%
c)
30%
d)
70%
e)
72%
Ans: e
Algorithm: No
Chapter/Section: 3.6
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: determining chemical formulas
Keyword 5: mass percentage
25.
The mineral mimetite has the formula Pb5(AsO4)3Cl. What mass percent of oxygen does it contain?
a)
38.70 %
b)
16.34 %
c)
50.32 %
d)
12.90 %
e)
1.08 %
Ans: d
Algorithm: Yes
Chapter/Section: 3.6
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: determining chemical formulas
Keyword 5: mass percentage
26.
You heat 3.853 g of a mixture of Fe3O4 and FeO to form 4.153 g Fe2O3. The mass percent of FeO originally in
the mixture was:
a)
92.8%
b)
57.9%
c)
42.1%
d)
40.0%
e)
none of these
Ans: b
Algorithm: Yes
Chapter/Section: 3.6
Difficulty: Difficult
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: determining chemical formulas
Keyword 5: mass percentage
27.
You take an aspirin tablet (a compound consisting solely of carbon, hydrogen, and oxygen) with a mass of
1.00 g, burn it in air, and collect 2.20 g of carbon dioxide and 0.400 g water. The molar mass of aspirin is
between 170 and 190 g/mol. The molecular formula of aspirin is
a)
C6H8O5
b)
C9H8O4
c)
C8H10O5
d)
C10H6O4
e)
none of these
Ans: b
Algorithm: No
Chapter/Section: 3.7
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: stoichiometry
Keyword 4: determining chemical formulas
Keyword 5: elemental analysis; molecular formula
28.
Potassium forms an oxide containing 1 oxygen atom for every 2 atoms of potassium. What is the coefficient
of oxygen in the balanced equation for the reaction of potassium with oxygen to form this oxide?
a)
0
b)
1
c)
2
d)
3
e)
4
Ans: b
Algorithm: No
Chapter/Section: 3.9
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: chemical equation
Keyword 5: balancing chemical equation
29.
Indium reacts with chlorine to form InCl3. In the balanced equation for this reaction, the coefficient of the
indium trichloride is
a)
1
b)
2
c)
3
d)
4
e)
6
Ans: b
Algorithm: No
Chapter/Section: 3.9
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: chemical equation
Keyword 5: balancing chemical equation
30.
Give (in order) the correct coefficients to balance the following reaction:
H2SnCl6 + H2S  SnS2 + HCl
a)
1, 2, 1, 6
b)
1, 2, 2, 2
c)
1, 1, 1, 6
d)
6, 2, 1, 1
e)
2, 4, 2, 6
Ans: a
Algorithm: No
Chapter/Section: 3.9
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: chemical equation
Keyword 5: balancing chemical equation
31.
In the balanced equation for the reaction:
xP4O6(s) + yH2O(l)  zH3PO3(aq)
if x equals 2, the coefficient z equals:
a)
2
b)
4
c)
6
d)
10
e)
none of these
Ans: e
Algorithm: No
Chapter/Section: 3.9
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: chemical equation
Keyword 5: balancing chemical equation
32.
The correct coefficients to balance the following reaction are, in order:
I2O5 + H2S  I2 + SO2 + H2O
a)
1, 1, 1, 1, 1
b)
1, 2, 1, 2, 1
c)
2, 4, 1, 4, 5
d)
2, 5, 2, 5, 5
e)
3, 5, 3, 5, 5
Ans: e
Algorithm: No
Chapter/Section: 3.9
Difficulty: Moderate
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: chemical equation
Keyword 5: balancing chemical equation
33.
When the following equation is balanced, what is the sum of the coefficients?
Al2(SO4)3 + Ca(OH)2  Al(OH)3 + CaSO4
a)
4
b)
9
c)
8
d)
7
e)
10
Ans: b
Algorithm: No
Chapter/Section: 3.9
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: chemical equation
Keyword 5: balancing chemical equation
34.
T F When balancing a chemical equation, it is generally best to start with the least complicated molecules.
Ans: False
Algorithm: No
Chapter/Section: 3.9
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: chemical equation
Keyword 5: balancing chemical equation
35.
T F To balance a chemical equation, the coefficients must not be changed.
Ans: False
Algorithm: No
Chapter/Section: 3.9
Difficulty: Easy
Keyword 1: Chemistry
Keyword 2: general chemistry
Keyword 3: early atomic theory
Keyword 4: chemical equation
Keyword 5: balancing chemical equation
In the space shuttle, the CO2 that the crew exhales is removed from the air by a reaction
within canisters of lithium hydroxide. On average, each astronaut exhales about 20.0 mol of
CO2 daily. What volume of water will be produced when this amount of CO2 reacts with an
excess of LiOH?
(Hint: the density of water is about 1.oo g/mL.)
CO2(g) + 2 LiOH(s) ------> Li2CO3(aq) + H2O