Name: __________________________ Date: _____________
1. A pure iron wire has a diameter of 2.00 mm costs $54.10 for 24.8 grams. How many
centimeters of wire can you buy for $100.00? (The volume of a piece of wire is given by
π • r2 • length, where r is the radius of the wire). The density of iron is 7.874 g/cm3.
A)
B)
C)
D)
E)
185 cm
168 cm
100. cm
58.2 cm
119 cm
2. Select the answer that expresses the result of this calculation with the correct number of
significant figures and with correct units.
A)
B)
C)
D)
E)
105.2 g/cm
105.2 g/cm2
105.2 g/cm3
105.19 g/cm
105.1968 g/cm
3. An 8.90 g sample of nickel occupies 1 mL.
Which one of the following statements is true?
A)
B)
C)
D)
E)
The density of a 2 mL sample would be the same as the 1 mL sample.
The density of a 2 mL sample would be twice that of the 1 mL sample.
The density of a 2 mL sample would be half that of the 1 mL sample.
The density of a 4.45 g sample of nickel would be half that of the 8.90 g sample.
The density of a 17.80 g sample of nickel would be twice that of the 8.90 g sample.
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4. Two students determined the volume of a glass container three separate times (see table
below). The true volume of the container is 24.20 mL.Which statement correctly
describes the students’ results?
Student A
24.3 mL
24.4 mL
24.5 mL
A)
B)
C)
D)
E)
Student B
24.89 mL
24.87 mL
24.88 mL
Student A’s results are the more accurate. Student B’s results are the more precise.
Student A’s results are the more accurate and precise.
Student B’s results are the more accurate and precise.
Student A’s results are the more precise.Student B’s results are the more accurate.
The precision and accuracy of the two data sets are identical.
5. Express the number 0.000114 in scientific notation.
A)
B)
C)
D)
E)
1.14 × 10–4
114 × 10–6
1.14 × 102
1.14 × 104
0.114 × 10–6
6. Which one of the following combinations of names and formulas of ions is incorrect?
A)
B)
C)
D)
E)
NO2–
MnO4–
ClO2–
PO43–
CrO42–
nitrate
permanganate
chlorite
phosphate
chromate
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7. R.A. Millikan conducted an oil-drop experiment and discovered the following physical
propert(y)ies of the electron.
I.
its charge-to-mass ratio, e/m
II.
its charge, e-
III. its nucleus having protons
IV. its nucleus having neutrons
A)
B)
C)
D)
E)
II
I and IV
IV
I and II
I, II and III
8. Which one of the following names for Mn2S3 is correct?
A)
B)
C)
D)
E)
Manganese(III) sulfide
Magnesium trisulfide
Dimanganese trisulfide
Manganese(VI) sulfide
Manganese(II) sulfide
9. Bromine consists of two isotopes; Br-79 (atomic mass = 78.918 amu) and Br-81 (atomic
mass = 80.916 amu). What is the percent abundance of the heavier isotope?
A)
B)
C)
D)
E)
49.35
50.65
35.49
65.50
79.90
10. The name for HF(g) is
A)
B)
C)
D)
E)
hydrogen fluoride.
hydrogen(I) fluoride.
hydrofluoric acid.
hydrogen fluorine.
fluoric acid.
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11. What is the coefficient(s) of N2(g) after balancing the following equation with the
smallest whole coefficient?
C3H6(g) + NO(g)
→
C3H3N(g)
+
H2O(g) +
N2(g)
A)
B)
C)
D)
E)
1
2
3
4
5
12. How much C3H6O2 is needed when it reacts with O2 to produce 0.9190 g H2O?
2C3H6O2(g) + 7O2(g) → 6CO2(g) +
6H2O(g)
A)
B)
C)
D)
E)
1.259 g
3.778 g
37.78 g
0.630 g
1.889 g
13. What is the molar mass of zinc sulfate hexahydrate?
A)
B)
C)
D)
E)
270. g/mol
162 g/mol
366 g/mol
564 g/mol
180. g/mol
14. A compound contains by mass, 25.5 % carbon, 40.4 % fluorine, and 34.1 % oxygen. A
0.050 mol sample of this compound weighs 9.40 g. The molecular formula of this
compound is
A)
B)
C)
D)
E)
C4F4O4
C5F5O5
CFO
C3F3O
C2F2O2
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15. How many grams are present in 5.33 x 1023 atoms of manganese?
A)
B)
C)
D)
E)
48.6 g
62.1 g
21.5 g
27.5 g
0.016 g
16. In which of the following molecules or ions does "Se" have a +6 oxidation number?
I. H2SeO3
A)
B)
C)
D)
E)
II H2SeO4
III. SeO42-
IV HSeO3
-
V. HSeO4
-
II, III and V only
I, II and V only
IV and V only
I, III and V only
I and II only
17. What volume of 0.955 M HCl, in mL, is required to titrate 2.152 g of Na2CO3 to the
equivalence point?
Na2CO3(aq) + 2HCl(aq) → H2O(l) + CO2(g) + 2NaCl(aq)
A)
B)
C)
D)
E)
42.5 mL
21.3 mL
38.8 mL
19.4 mL
58.2 mL
18. Many metals react readily with acids to give a metal-containing salt and H2 gas.
Ca(s) + 2HCl(aq)
CaCl2(aq) + H2(g)
Which one of the following answers correctly describes the reaction above?
A)
B)
C)
D)
E)
Ca is the reducing agent and H+ is reduced.
Ca is the oxidizing agent and HCl is the reducing agent.
HCl is oxidized and Ca is reduced.
Cl from HCl is oxidized.
Cl from HCl is reduced.
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19. Dimethyl sulfoxide (DMSO), (CH3)2SO, can be prepared by the reaction of oxygen with
dimethyl sulfide, (CH3)2S, according to the following equation:
O2 + 2(CH3)2S  2(CH3)2SO
If the percentage yield for the reaction is 83%, how many grams of DMSO could
be produced from 65 g of dimethyl sulfide , (CH3)2S, and excess O2?
A)
B)
C)
D)
E)
68 g
75 g
83 g
51 g
49 g
20. Sodium bicarbonate and acetic acid react according to the equation:
NaHCO3(aq) + CH3COOH (aq) →NaCH3CO2 (aq) +CO2 (g) + H2O (l)
What mass of sodium acetate (NaCH3CO2) can be obtained from mixing 15.0 g of
NaHCO3 with 125 mL of 0.150 M acetic acid?
A)
B)
C)
D)
E)
1.54 g
1.58 g
1.25 g
1.34 g
4.55 g
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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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