Name: __________________________ Date: _____________
1. What answer should be reported, with the correct number of significant figures, for the
following calculation?
(965.43 × 3.911) + 9413.4136 - 0.11
A)
B)
C)
D)
E)
13189
13189.1
4
1.32 × 10
4
1.3 × 10
4
1.319 × 10
2. How many kL does a 8.55 × 108 cL sample contain?
A)
B)
C)
D)
E)
3
8.55 × 10
13
8.55 × 10
4
8.55 × 10
12
8.55 × 10
2
8.55 × 10
3. A property that does not depend on the amount of matter is called
A)
B)
C)
D)
E)
intensive property.
inclusive property.
empirical property.
extensive property.
exclusive property.
4. A sheet of copper (Cu) foil has a total area of 2.250 ft2 and a mass of 4.357 g. What is
the thickness of the foil in millimeters?
(Given: density of Cu = 3.250 g/cm3; 1 ft = 12 inch; 1 inch = 2.54 cm)
A)
B)
C)
D)
E)
6.413 x 10-3
1.341
1.443 x 10-3
2.090 x 10-4
2.090 x 10-2
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5. The law of definite proportions applies to ________.
A)
B)
C)
D)
E)
compounds
solutions
heterogeneous mixtures
homogeneous mixtures
allotropes
6. Dalton's Atomic Theory states that
A)
B)
C)
D)
E)
matter is composed of small indivisible particles.
all elements have several isotopes.
the properties of all elements are the same.
energy is neither created nor destroyed during a chemical reaction.
an atom is predominantly empty space.
7. Which of the following is not a correct description of 16.0 grams of methane, CH4 ?
A)
B)
C)
D)
E)
It is 9.63  1023 molecules of methane.
It is the amount of methane that contains 4.0 grams of hydrogen.
It is the amount of methane that contains 2.40  1024 hydrogen atoms.
It is the amount of methane that contains 12.0 g of carbon.
It is one mole of methane.
8. Which one of the following is not a name of a cation?
A)
B)
C)
D)
E)
sulfide
magnesium ion
ammonium
iron(III)
hydronium ion
9. An unknown element is found to have three naturally occurring isotopes with atomic
masses of 35.9675 (0.337 %), 37.9627 (0.063 %), and 39.9624 (99.600 %). Which one
of the following is the unknown element?
A)
B)
C)
D)
E)
Ar
K
Ca
Y
Zr
Page 2
10. Which one of the following is the formula of iron(III) oxide?
A)
B)
C)
D)
E)
Fe2O3
Fe3O
FeO
FeO3
Fe2O
11. How many molecules are there in 36 mg aspartame (C14H18N2O5)?
A)
B)
C)
D)
E)
19
7.4 × 10
18
2.0 × 10
20
4.0 × 10
25
4.2 × 10
22
1.4 × 10
12. The percent composition of a hydrocarbon compound is 92.26 % carbon and 7.74 %
hydrogen. What is the molecular formula of this compound if 2.44 g contains
22
1.41 × 10 molecules?
A)
B)
C)
D)
E)
C8H8
CH
C2H2
C4H4
C6H6
13. How many moles of calcium phosphate will be produced when one mole of P4O10 reacts
completely with Ca(OH)2 ? Note: the other product is water.
A)
B)
C)
D)
E)
2
1
3
4
5
Page 3
14. What mass of Ni(CO)4 could be obtained when 75.0 g of carbon reacts completely as
shown in the following two reactions?
[Hint: Assume 100 % yield for both reactions and Ni and water are both in excess].
C + H2O  CO + H2
Ni + 4CO  Ni(CO)4
A)
B)
C)
D)
E)
267 g
171 g
62.5 g
130. g
31.3 g
15. How many moles are present in 17.4 g of lead?
A)
B)
C)
D)
E)
0.0840
0.0994
1.05
0.0611
2.06
16. The oxidation state (or oxidation number) of vanadium in VO2+ is ________.
A)
B)
C)
D)
E)
+4
-4
+2
-2
0
17. Identify the net ionic equation for the reaction that occurs when aqueous solutions of
Ba(ClO4)2 and K2SO4 are mixed.
A)
B)
C)
D)
E)
Ba2+(aq) + SO42-(aq)  BaSO4(s)
2K+(aq) + 2ClO4-(aq)  K2(ClO4)2(s)
K+(aq) + ClO4-(aq)  KClO4(s)
Ba(ClO4)2(aq) + K2SO4(aq)  BaSO4(s) + 2KClO4(s)
Ba2+(aq) + 2K+(aq) + 2SO42-(aq)  K2Ba(SO4)2(s)
Page 4
18. The following reaction can be classified as
2 NO2(g) + H2O(l)  HNO2(aq) + HNO3(aq)
A)
B)
C)
D)
E)
disproportionation reaction
combination reaction
acid-base neutralization reaction
combustion reaction
hydrogen displacement reaction
19. A student added 40.0 mL of an NaOH solution to 90.0 mL of 0.400 M HCl. The
solution was then treated with an excess of nickel(II) nitrate, resulting in the formation
of 1.06 g of Ni(OH)2 precipitate. Determine the concentration of the original NaOH
solution.
A)
B)
C)
D)
E)
1.47 M
2.29 M
2.00 M
1.65 M
1.73 M
20. If 20.0 mL of 0.200 M NaCl is mixed with 50.0 mL of 0.350 M Na3PO4, what will be
the concentration of Na+ ions in the resulting solution?
A)
B)
C)
D)
E)
0.807 M
4.00 x 10-3 M
0.0565 M
0.700 M
0. 0700 M
Page 5
Answer Key
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
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