Review Multiple Choice

Name: ________________________ Class: ___________________ Date: __________
Unit 3 Review
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1) When the following equation is balanced, the coefficients are ____.
A)
B)
C)
D)
E)
C8H18 + O2  CO2 + H2O
2, 3, 4, 4
1, 4, 8, 9
2, 12, 8, 9
4, 4, 32, 36
2, 25, 16, 18
____
2) Of the reactions below, which one is not a combination reaction?
A) C + O2  CO2
B) 2Mg + O2  2MgO
C) 2N2 + 3H2  2NH 3
D) CaO + H2O  Ca(OH)2
E) 2CH4 + 4O2  2CO2 + 4H2O
____
3) When a hydrocarbon burns in air, what component of air reacts?
A) oxygen
B) nitrogen
C) carbon dioxide
D) water
E) argon
____
4) When a hydrocarbon burns in air, a component produced is ____.
A) oxygen
B) nitrogen
C) carbon
D) water
E) argon
____
5) Which one of the following substances is the product of this combination reaction?
A)
B)
C)
D)
E)
Al (s) + I2 (s)  ____
AlI2
AlI
AlI3
Al2I3
Al3I2
1
ID: A
Name: ________________________
ID: A
____
6) Which one of the following is not true concerning automotive air bags?
A) They are inflated as a result of a decomposition reaction.
B) They are loaded with sodium azide initially.
C) The gas used for inflating them is oxygen.
D) The two products of the decomposition reaction are sodium and nitrogen.
E) A gas is produced when the air bag activates.
____
7) The reaction used to inflate automobile airbags ____.
A) produces sodium gas
B) is a combustion reaction
C) is a combination reaction
D) violates the law of conservation of mass
E) is a decomposition reaction
____
8) Which of the following are combination reactions?
1) CH4 (g) + O2 (g)  CO2 (g) + H2O (l)
2) CaO (s) + CO2 (g)  CaCO3 (s)
3) Mg (s) + O2 (g)  MgO (s)
4) PbCO3 (s)  PbO (s) + CO2 (g)
A) 1, 2, and 3
B) 2 and 3
C) 1, 2, 3, and 4
D) 4 only
E) 2, 3, and 4
____
9) Which of the following are combustion reactions?
1) CH4 (g) + O2 (g)  CO2 (g) + H2O (l)
2) CaO (s) + CO2 (g)  CaCO3 (s)
3) PbCO3 (s)  PbO (s) + CO2 (g)
4) CH3OH (l) + O2 (g)  CO2 (g) + H2O (l)
A) 1 and 4
B) 1, 2, 3, and 4
C) 1, 3, and 4
D) 2, 3, and 4
E) 3 and 4
____ 10) Which of the following are decomposition reactions?
1) CH4 (g) + O2 (g)  CO2 (g) + H2O (l)
2) CaO (s) + CO2 (g)  CaCO3 (s)
3) Mg (s) + O2 (g)  MgO (s)
4) PbCO3 (s)  PbO (s) + CO2 (g)
A) 1, 2, and 3
B) 4 only
C) 1, 2, 3, and 4
D) 2 and 3
E) 2, 3, and 4
2
Name: ________________________
ID: A
____ 11) The formula of nitrobenzene is C6H5NO2. The molecular weight of this compound is ____ amu.
A) 107.11
B) 43.03
C) 109.10
D) 123.11
E) 3.06
____ 12) The formula weight of potassium dichromate (K2Cr2O7) is ____ amu.
A) 107.09
B) 255.08
C) 242.18
D) 294.18
E) 333.08
____ 13) The formula weight of silver chromate (Ag2CrO4) is ____ amu.
A) 159.87
B) 223.87
C) 331.73
D) 339.86
E) 175.87
____ 14) The formula weight of ammonium sulfate ((NH4)2SO4), rounded to the nearest integer, is ____ amu.
A) 100
B) 118
C) 116
D) 132
E) 264
____ 15) The molecular weight of the acetic acid (CH3CO2H), rounded to the nearest integer, is ____ amu.
A) 60
B) 48
C) 44
D) 32
____ 16) The formula weight of a substance is ____.
A) identical to the molar mass
B) the same as the percent by mass weight
C) determined by combustion analysis
D) the sum of the atomic weights of each atom in its chemical formula
E) the weight of a sample of the substance
____ 17) The formula weight of calcium nitrate (Ca(NO3)2), rounded to one decimal place, is ____ amu.
A) 102.1
B) 164.0
C) 204.2
D) 150.1
E) 116.1
3
Name: ________________________
ID: A
____ 18) The formula weight of magnesium fluoride (MgF2), rounded to one decimal place, is ____ amu.
A) 86.6
B) 43.3
C) 62.3
D) 67.6
E) 92.9
____ 19) The formula weight of lead nitrate (Pb(NO3)2) is ____ amu.
A) 269.2
B) 285.2
C) 317.2
D) 331.2
E) 538.4
____ 20) The mass % of C in methane (CH4) is ____.
A) 25.13
B) 133.6
C) 74.87
D) 92.26
E) 7.743
____ 21) The mass % of H in methane (CH4) is ____.
A) 25.13
B) 4.032
C) 74.87
D) 92.26
E) 7.743
____ 22) The mass % of F in the binary compound KrF 2 is ____.
A) 18.48
B) 45.38
C) 68.80
D) 81.52
E) 31.20
____ 23) Calculate the percentage by mass of nitrogen in PtCl 2(NH3)2.
A) 4.67
B) 9.34
C) 9.90
D) 4.95
E) 12.67
____ 24) Calculate the percentage by mass of lead in Pb(NO3)2.
A) 38.6
B) 44.5
C) 62.6
D) 65.3
E) 71.2
4
Name: ________________________
ID: A
____ 25) Calculate the percentage by mass of lead in PbCO 3.
A) 17.96
B) 22.46
C) 73.05
D) 77.54
E) 89.22
____ 26) Calculate the percentage by mass of oxygen in Pb(NO 3)2.
A) 9.7
B) 14.5
C) 19.3
D) 29.0
E) 33.4
____ 27) One mole of ____ contains the largest number of atoms.
A) S8
B) C10H8
C) Al2(SO4)3
D) Na3PO4
E) Cl2
____ 28) One mole of ____ contains the smallest number of atoms.
A) S8
B) C10H8
C) Al2(SO4)3
D) Na3PO4
E) NaCl
____ 29) One million argon atoms is ____ mol (rounded to two significant figures) of argon atoms.
A) 3.0
B) 1.7  10–18
C) 6.0  1023
D) 1.0  10–6
E) 1.0  106
____ 30) A 30.5 gram sample of glucose (C6H12O6) contains ____ mol of glucose.
A) 0.424
B) 0.169
C) 5.90
D) 2.36
E) 0.136
____ 31) A sample of CH4O with a mass of 32.0 g contains ____ molecules of CH 4O.
A) 5.32  10–23
B) 1.00
C) 1.88  1022
D) 6.02  1023
E) 32.0
5
Name: ________________________
ID: A
____ 32) How many sulfur dioxide molecules are there in 1.80 mol of sulfur dioxide?
A) 1.08  1023
B) 6.02  1024
C) 1.80  1024
D) 1.08  1024
E) 6.02  1023
____ 33) How many sulfur dioxide molecules are there in 0.180 mol of sulfur dioxide?
A) 1.80  1023
B) 6.02  1024
C) 6.02  1023
D) 1.08  1024
E) 1.08  1023
____ 34) How many moles of sodium carbonate contain 1.773  1017 carbon atoms?
A) 5.890  10–7
B) 2.945  10–7
C) 1.473  10–7
D) 8.836  10–7
E) 9.817  10–8
____ 35) How many grams of sodium carbonate contain 1.773  1017 carbon atoms?
A) 3.121  10–5
B) 1.011  10–5
C) 1.517  10–5
D) 9.100  10–5
E) 6.066  10–5
____ 36) The compound responsible for the characteristic smell of garlic is allicin, C 6H10OS2. The mass of 1.00 mol of
allicin, rounded to the nearest integer, is ____ g.
A) 34
B) 162
C) 86
D) 61
E) 19
____ 37) The molecular formula of aspartame, the generic name of NutraSweet®, is C14H18N2O5. The molar mass of
aspartame, rounded to the nearest integer, is ____ g.
A) 24
B) 156
C) 294
D) 43
E) 39
6
Name: ________________________
ID: A
____ 38) There are ____ oxygen atoms in 30 molecules of C 20H42S3O2.
A) 6.0  1023
B) 1.8  1025
C) 3.6  1025
D) 1.2  1024
E) 60
____ 39) When the following equation is balanced, the coefficients are ____.
A)
B)
C)
D)
E)
NH3 (g) + O2 (g)  NO2 (g) + H2O (g)
1, 1, 1, 1
4, 7, 4, 6
2, 3, 2, 3
1, 3, 1, 2
4, 3, 4, 3
____ 40) When the following equation is balanced, the coefficients are ____.
A)
B)
C)
D)
E)
Al(NO3)3 + Na2S  Al2S3 + NaNO3
2, 3, 1, 6
2, 1, 3, 2
1, 1, 1, 1
4, 6, 3, 2
2, 3, 2, 3
____ 41) When the following equation is balanced, the coefficient of H2 is ____.
K (s) + H2O (l)  KOH (aq) + H2 (g)
A)
B)
C)
D)
E)
1
2
3
4
5
____ 42) When the following equation is balanced, the coefficient of Al is ____.
Al (s) + H2O (l)  Al(OH)3 (s) + H2 (g)
A)
B)
C)
D)
E)
1
2
3
5
4
7
Name: ________________________
ID: A
____ 43) When the following equation is balanced, the coefficient of H 2O is ____.
Ca (s) + H2O (l)  Ca(OH)2 (aq) + H2 (g)
A)
B)
C)
D)
E)
1
2
3
5
4
____ 44) When the following equation is balanced, the coefficient of Al 2O3 is ____.
Al2O3 (s) + C (s) + Cl2 (g)  AlCl3 (s) + CO (g)
A)
B)
C)
D)
E)
1
2
3
4
5
____ 45) When the following equation is balanced, the coefficient of H 2S is ____.
FeCl3 (aq) + H2S (g)  Fe2S3 (s) + HCl (aq)
A)
B)
C)
D)
E)
1
2
3
5
4
____ 46) When the following equation is balanced, the coefficient of HCl is ____.
CaCO3 (s) + HCl (aq)  CaCl2 (aq) + CO2 (g) + H2O (l)
A)
B)
C)
D)
E)
1
2
3
4
0
____ 47) When the following equation is balanced, the coefficient of HNO 3 is ____.
HNO3 (aq) + CaCO3 (s)  Ca(NO3)2 (aq) + CO2 (g) + H2O (l)
A)
B)
C)
D)
E)
1
2
3
5
4
8
Name: ________________________
ID: A
____ 48) When the following equation is balanced, the coefficient of H 3PO4 is ____.
H3PO4 (aq) + NaOH (aq)  Na3PO4 (aq) + H2O (l)
A)
B)
C)
D)
E)
1
2
3
4
0
____ 49) When the following equation is balanced, the coefficient of C 3H8O3 is ____.
C3H8O3 (g) + O2 (g)  CO2 (g) + H2O (g)
A)
B)
C)
D)
E)
1
2
3
7
5
____ 50) When the following equation is balanced, the coefficient of O 2 is ____.
C2H4O (g) + O2 (g)  CO2 (g) + H2O (g)
A)
B)
C)
D)
E)
2
3
4
5
1
____ 51) When the following equation is balanced, the coefficient of H 2 is ____.
CO (g) + H2 (g)  H2O (g) + CH4 (g)
A)
B)
C)
D)
E)
1
2
3
4
0
____ 52) When the following equation is balanced, the coefficient of H 2SO4 is ____.
A)
B)
C)
D)
E)
H2SO4 (aq) + NaOH (aq)  Na2SO4 (aq) + H2O (l)
1
2
3
4
0.5
9
Name: ________________________
ID: A
____ 53) When the following equation is balanced, the coefficient of water is ____.
K (s) + H2O (l)  KOH (aq) + H2 (g)
A)
B)
C)
D)
E)
1
2
3
4
5
____ 54) When the following equation is balanced, the coefficient of hydrogen is ____.
K (s) + H2O (l)  KOH (aq) + H2 (g)
A)
B)
C)
D)
E)
1
2
3
4
5
____ 55) When the following equation is balanced, the coefficient of oxygen is ____.
PbS (s) + O2 (g)  PbO (s) + SO2 (g)
A)
B)
C)
D)
E)
1
3
2
4
5
____ 56) When the following equation is balanced, the coefficient of sulfur dioxide is ____.
PbS (s) + O2 (g)  PbO (s) + SO2 (g)
A)
B)
C)
D)
E)
5
1
3
2
4
____ 57) When the following equation is balanced, the coefficient of dinitrogen pentoxide is ____.
N2O5 (g) + H2O (l)  HNO3 (aq)
A)
B)
C)
D)
E)
1
2
3
4
5
10
Name: ________________________
ID: A
____ 58) When the following equation is balanced, the coefficient of water is ____.
N2O5 (g) + H2O (l)  HNO3 (aq)
A)
B)
C)
D)
E)
5
2
3
4
1
____ 59) When the following equation is balanced, the coefficient of nitric acid is ____.
N2O5 (g) + H2O (l)  HNO3 (aq)
A)
B)
C)
D)
E)
5
2
3
4
1
____ 60) The balanced equation for the decomposition of sodium azide is ____.
A) 2NaN3 (s)  2Na (s) + 3N2 (g)
B) 2NaN3 (s)  Na2 (s) + 3N2 (g)
C) NaN3 (s)  Na (s) + N2 (g)
D) NaN3 (s)  Na (s) + N2 (g) + N (g)
E) 2NaN3 (s)  2Na (s) + 2N2 (g)
____ 61) There are ____ mol of carbon atoms in 4 mol of C4H8O2.
A) 4
B) 8
C) 16
D) 20
E) 32
____ 62) There are ____ sulfur atoms in 25 molecules of C 4H4S2.
A) 1.5  1025
B) 4.8  1025
C) 3.0  1025
D) 50
E) 6.02  1023
____ 63) There are ____ hydrogen atoms in 25 molecules of C 4H4S2.
A) 25
B) 3.8  1024
C) 6.0  1025
D) 100
E) 1.5  1025
11
Name: ________________________
ID: A
____ 64) A sample of C3H8O that contains 200 molecules contains ____ carbon atoms.
A) 600
B) 200
C) 3.61  1026
D) 1.20  1026
E) 4.01  1025
____ 65) How many moles of carbon monoxide are there in 36.55 g of carbon monoxide?
A) 0.8452
B) 1.305
C) 0.9291
D) 2.589
E) 3.046
____ 66) How many moles of carbon dioxide are there in 52.06 g of carbon dioxide?
A) 0.8452
B) 1.183
C) 6.022  1023
D) 8.648  1023
E) 3.134  1025
____ 67) There are ____ molecules of methane in 0.123 mol of methane (CH4).
A) 5
B) 2.46  10–2
C) 2.04  10–25
D) 7.40  1022
E) 0.615
____ 68) A compound is composed of only C, H, and O. The combustion of a 0.519-g sample of the compound yields
1.24 g of CO2 and 0.255 g of H2O. What is the empirical formula of the compound?
A) C6H6O
B) C3H3O
C) CH3O
D) C2H6O5
E) C2H6O2
____ 69) The combustion of propane (C3H8) in the presence of excess oxygen yields CO 2 and H2O:
C3H8 (g) + 5O2 (g)  3CO2 (g) + 4H2O (g)
When 2.5 mol of O2 are consumed in their reaction, ____ mol of CO 2 are produced.
A) 1.5
B) 3.0
C) 5.0
D) 6.0
E) 2.5
12
Name: ________________________
ID: A
____ 70) The combustion of propane (C3H8) produces CO2 and H2O:
C3H8 (g) + 5O2 (g)  3CO2 (g) + 4H2O (g)
The reaction of 2.5 mol of O2 with 4.6 mol of C3H8 will produce ____ mol of H 2O.
A) 4.0
B) 3.0
C) 2.5
D) 2.0
E) 1.0
____ 71) Silver nitrate and aluminum chloride react with each other by exchanging anions:
3AgNO3 (aq) + AlCl3 (aq)  Al(NO3)3 (aq) + 3AgCl (s)
What mass in grams of AgCl is produced when 4.22 g of AgNO 3 react with 7.73 g of AlCl3?
A) 17.6
B) 4.22
C) 24.9
D) 3.56
E) 11.9
____ 72) When the following equation is balanced, the coefficients are ________.
A)
B)
C)
D)
E)
C8H18 + O2  CO2 + H2O
4, 50, 16, 18
1, 5, 2, 2
2, 2, 7, 1
1, 13, 8, 9
2, 25, 16, 18
____ 73) The formula weight of PbCO3 is ________ amu.
A) 279.2
B) 112.0
C) 118.0
D) 267.2
E) 235.2
____ 74) The molecular weight of 2-propanol (C3H7OH), known as rubbing alcohol, is ________ amu (rounded to one
decimal place).
A) 59.1
B) 29.0
C) 60.1
D) 12.0
E) 34.0
13
Name: ________________________
ID: A
____ 75) The molecular weight of ethanol (C2H5OH), rounded to one decimal place, is ________ amu.
A) 45.1
B) 26.0
C) 25.0
D) 46.1
E) 29.0
____ 76) The molecular weight of maltose (C12H22O11), rounded to one decimal place, is ________ amu.
A) 507.2
B) 182.0
C) 15.0
D) 342.3
E) 29.0
____ 77) There are ________ mol of carbon atoms in 5 mol of dimethylsulfoxide (C 2H6SO).
A) 4
B) 8
C) 10
D) 12
E) 14
____ 78) Magnesium burns in air with a dazzling brilliance to produce magnesium oxide:
2Mg (s) + O2 (g)  2MgO (s)
When 5.50 g of magnesium burns, the theoretical yield of magnesium oxide is ________ g.
A) 5.50
B) 9.12
C) 0.226
D) 4.56
E) 18.2
True/False
Indicate whether the statement is true or false.
____
1) The molecular weight is always a whole-number multiple of the empirical formula weight.
____
2) The quantity of product that is calculated to form when all of the limiting reagent reacts is called the actual
yield.
14
ID: A
Unit 3 Review
Answer Section
MULTIPLE CHOICE
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3.1; G2
E
3.2; G2
A
3.2; G2
D
3.2; G2
C
3.2; G2
C
3.2; G2
E
3.2; G2
B
3.2; G2
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3.2; G2
B
3.2; G2
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3.3; G4
D
3.3; G4
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3.3; G4
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3.3; G4
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3.3; G4
D
3.3; G2
B
3.3; G4
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3.3; G4
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3.3; G4
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3.3; G4
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3.3; G4
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3.3; G4
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3.3; G4
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3.3; G4
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3.3; G4
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3.4; G4
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3.4; G4
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3.4; G4
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3.4; G4
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3.4; G4
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3.4; G4
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3.4; G4
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3.4; G4
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3.4; G7
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3.1; G2
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3.1; G2
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3.1; G2
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3.1; G2
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3.1; G2
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3.1; G2
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DIF: 2
REF: Page Ref: 3.3
PTS: 1
DIF: 2
REF: Page Ref: 3.4
PTS: 1
DIF: 1
REF: Page Ref: 3.4
PTS: 1
DIF: 2
REF: Page Ref: 3.4
PTS: 1
DIF: 2
REF: Page Ref: 3.4
PTS: 1
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REF: Page Ref: 3.4
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DIF: 2
REF: Page Ref: 3.4
PTS: 1
DIF: 2
REF: Page Ref: 3.4
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PTS: 1
DIF: 1
REF: Page Ref: 3.4
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DIF: 2
REF: Page Ref: 3.4
PTS: 1
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REF: Page Ref: 3.1
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REF: Page Ref: 3.1
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REF: Page Ref: 3.1
2
ID: A
46) ANS:
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47) ANS:
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48) ANS:
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49) ANS:
OBJ:
50) ANS:
OBJ:
51) ANS:
OBJ:
52) ANS:
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53) ANS:
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54) ANS:
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55) ANS:
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56) ANS:
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57) ANS:
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58) ANS:
OBJ:
59) ANS:
OBJ:
60) ANS:
OBJ:
61) ANS:
OBJ:
62) ANS:
OBJ:
63) ANS:
OBJ:
64) ANS:
OBJ:
65) ANS:
OBJ:
66) ANS:
OBJ:
67) ANS:
OBJ:
68) ANS:
OBJ:
69) ANS:
OBJ:
B
3.1; G2
B
3.1; G2
A
3.1; G2
B
3.1; G2
D
3.1; G2
C
3.1; G2
A
3.1; G2
B
3.1; G2
A
3.1; G2
B
3.1; G2
D
3.1; G2
A
3.1; G2
E
3.1; G2
B
3.1; G2
A
3.2; G2
C
3.4; G4
D
3.4; G4
D
3.4; G4
A
3.4; G4
B
3.4; G4
B
3.4; G4
D
3.4; G4
B
3.5; G4
A
3.6; G4
PTS: 1
DIF: 2
REF: Page Ref: 3.1
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REF: Page Ref: 3.1
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DIF: 2
REF: Page Ref: 3.2
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DIF: 1
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DIF: 2
REF: Page Ref: 3.4
PTS: 1
DIF: 2
REF: Page Ref: 3.4
PTS: 1
DIF: 2
REF: Page Ref: 3.4
PTS: 1
DIF: 2
REF: Page Ref: 3.4
PTS: 1
DIF: 2
REF: Page Ref: 3.4
PTS: 1
DIF: 4
REF: Page Ref: 3.5
PTS: 1
DIF: 2
REF: Page Ref: 3.6
3
ID: A
70) ANS:
OBJ:
71) ANS:
OBJ:
72) ANS:
OBJ:
73) ANS:
OBJ:
74) ANS:
OBJ:
75) ANS:
OBJ:
76) ANS:
OBJ:
77) ANS:
OBJ:
78) ANS:
OBJ:
D
3.7; G4
D
3.7; G4
E
3.1; G2
D
3.3; G4
C
3.3; G4
D
3.3; G4
D
3.3; G4
C
3.4; G4
B
3.7; G4
PTS: 1
DIF: 2
REF: Page Ref: 3.7
PTS: 1
DIF: 4
REF: Page Ref: 3.7
PTS: 1
DIF: 2
REF: Page Ref: 3.1
PTS: 1
DIF: 2
REF: Page Ref: 3.3
PTS: 1
DIF: 1
REF: Page Ref: 3.3
PTS: 1
DIF: 1
REF: Page Ref: 3.3
PTS: 1
DIF: 1
REF: Page Ref: 3.3
PTS: 1
DIF: 1
REF: Page Ref: 3.4
PTS: 1
DIF: 3
REF: Page Ref: 3.7
T
3.5; G2
F
3.7; G2
PTS: 1
DIF: 1
REF: Page Ref: 3.5
PTS: 1
DIF: 1
REF: Page Ref: 3.7
TRUE/FALSE
1) ANS:
OBJ:
2) ANS:
OBJ:
4
Unit 3 Review [Answer Strip]
E
_____
1)
ID: A
C
_____
6)
D 11)
_____
C 18)
_____
D 25)
_____
E
_____
7)
D 12)
_____
D 19)
_____
D 26)
_____
B
_____
8)
C 13)
_____
C 20)
_____
B 27)
_____
D 14)
_____
A 21)
_____
E 28)
_____
A 15)
_____
E 22)
_____
E
_____
2)
A
_____
3)
A
_____
9)
B 29)
_____
D
_____
4)
D 16)
_____
B 23)
_____
C
_____
5)
B 30)
_____
B 10)
_____
B 17)
_____
C 24)
_____
D 31)
_____
Unit 3 Review [Answer Strip]
D 32)
_____
E 38)
_____
E 33)
_____
B 39)
_____
ID: A
B 43)
_____
A 48)
_____
B 53)
_____
A 44)
_____
B 49)
_____
A 54)
_____
C 45)
_____
D 50)
_____
B 55)
_____
B 46)
_____
C 51)
_____
D 56)
_____
B 47)
_____
A 52)
_____
A 57)
_____
B 34)
_____
A 40)
_____
A 35)
_____
A 41)
_____
B 36)
_____
B 42)
_____
C 37)
_____
Unit 3 Review [Answer Strip]
E 58)
_____
A 64)
_____
ID: A
D 70)
_____
D 75)
_____
D 76)
_____
B 65)
_____
B 59)
_____
D 71)
_____
B 66)
_____
C 77)
_____
D 67)
_____
B 78)
_____
A 60)
_____
E 72)
_____
C 61)
_____
B 68)
_____
D 73)
_____
D 62)
_____
T
_____
1)
A 69)
_____
C 74)
_____
D 63)
_____
F
_____
2)