Test Bank for Chemistry An Introduction to General
Organic and Biological Chemistry 13th Edition Timberlake
ISBN 0134421353
9780134421353
Full download link at: https://testbankpack.com/p/test-bank-for-chemistry-an-introduction-to-general-organic-andbiological-chemistry-13th-edition-timberlake-isbn-0134421353-9780134421353/ An Introduction to General, Organic, and Biological Chemistry, 13e (Timberlake)
Chapter 7 Chemical Quantities and Reactions
7.1 Multiple-Choice Questions
1) One mole of particles of any substance contains how many particles?
A) particles
B) 3 × particles
C) 3 × particles
D) 6.02 × particles
E) 6.02 × particles
Answer: D
Page Ref: 7.1
Learning Obj.: 7.1
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
2) Avogadro's number is the number of ________.
A) particles in 1 mole of a substance
B) amu in 1 mole of a substance
C) grams in 1 mole of a substance
D) moles in 6.02 × g of an element
E) moles in 6.02 × amu of an element
Answer: A
Page Ref: 7.1
Learning Obj.: 7.1
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
3) One mole of copper(II) sulfate, CuS , contains ________ O atoms.
A) 4
B) 6.02 ×
C) 1.51 ×
D) 2.41 ×
E) 2.41 ×
Answer: E
Page Ref: 7.1
Learning Obj.: 7.1
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
4) 0.400 mole of sucrose, , contains ________ C atoms.
A) 12
B) 6.02 ×
C) 5.02 ×
D) 2.89 ×
E) 4.80
Answer: D
Page Ref: 7.1
Learning Obj.: 7.1
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
5) One mole of copper(II) sulfate, CuS , contains ________ moles of O.
A) 4
B) 6.02 ×
C) 1.51 ×
D) 2.41 ×
E) 2.41 ×
Answer: A
Page Ref: 7.1
Learning Obj.: 7.1
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
6) 0.400 mole of sucrose, , contains ________ moles of C.
A) 12
B) 6.02 ×
C) 5.02 ×
D) 2.89 ×
E) 4.80
Answer: E
Page Ref: 7.1
Learning Obj.: 7.1
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
7) How many moles of carbon atoms are there in 0.500 mole of ?
A) 0.500 mole
B) 1.00 mole
C) 3.00 moles
D) 6.02 × moles
E) 4.00 moles
Answer: B
Page Ref: 7.1
Learning Obj.: 7.1
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
8) The molar mass of potassium is ________.
A) 19.00 g/mole
B) 31.00 g/mole
C) 6.02 × g/mole
D) 39.10 g/mole
E) 15.02 g/mole
Answer: D
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
9) The molar mass of helium is ________.
A) 1.000 g
B) 2.002 g
C) 3.003 g
D) 4.003 g
E) 8.006 g
Answer: D
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
10) Calculate the molar mass of potassium chloride, KCl.
A) 74.55 g/mole
B) 54.55 g/mole
C) 6.745 g/mole
D) 67.45 g/mole
E) 19.00 g/mole
Answer: A
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
11) What is the molar mass of copper(II) sulfate, CuS ?
A) 16.00 g/mole
B) 63.60 g/mole
C) 111.6 g/mole
D) 159.6 g/mole
E) 319.2 g/mole
Answer: D
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
12) Calculate the molar mass of magnesium chloride, Mg .
A) 24.31 g/mole
B) 95.21 g/mole
C) 125.9 g/mole
D) 59.76 g/mole
E) 70.90 g/mole
Answer: B
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
13) What is the molar mass of sodium phosphate, ?
A) 69.96 g/mole
B) 118.0 g/mole
C) 163.9 g/mole
D) 226.1 g/mole
E) 354.0 g/mole
Answer: C
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
14) What is the molar mass of sucrose ( )?
A) 29.02 g/mole
B) 50.23 g/mole
C) 210.0 g/mole
D) 342.3 g/mole
E) 182.0 g/mole
Answer: D
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
15) One mole of neon atoms has a mass of ________.
A) 6.02 × g
B) 14.01 g
C) 10.01 g
D) 20.18 g
E) 22.99 g
Answer: D
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
16) The molar mass of is ________.
A) 76.09 g/mole
B) 60.09 g/mole
C) 29.02 g/mole
D) 69.02 g/mole
E) 52.01 g/mole
Answer: A
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
17) The molar mass of calcium hydroxide, , is ________.
A) 58.09 g/mole
B) 57.09 g/mole
C) 74.10 g/mole
D) 114.2 g/mole
E) 54.02 g/mole
Answer: C
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
18) What is the molar mass of , a substance formerly used in medicine as an antacid?
A) 71.28 g/mole
B) 118.3 g/mole
C) 150.3 g/mole
D) 214.3 g/mole
E) 262.9 g/mole
Answer: E
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
19) How many moles of water, O, are present in 75.0 g O?
A) 4.41 moles
B) 4.16 moles
C) 75.0 moles
D) 7.50 moles
E) 1.35 × moles
Answer: B
Page Ref: 7.3
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
20) 0.100 mole of lithium has a mass of ________.
A) 3.00 g
B) 0.300 g
C) 6.94 g
D) 0.694 g
E) 0.700 g
Answer: D
Page Ref: 7.3
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
21) 4.00 moles of sodium have a mass of ________.
A) 4.60 g
B) 11.0 g
C) 23.0 g
D) 44.0 g
E) 92.0 g
Answer: E
Page Ref: 7.3
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
22) How many moles of are in 15.0 g of ?
A) 0.172 moles
B) 2.61 × 103 moles
C) 0.111 moles
D) 0.0861 moles
E) 0.119 moles
Answer: D
Page Ref: 7.3
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
23) 3.00 moles of have a mass of ________.
A) 138 g
B) 46.0 g
C) 30.0 g
D) 90.0 g
E) 45.0 g
Answer: A
Page Ref: 7.3
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
24) How many grams of are there in 0.500 mole of ?
A) 79.9 g
B) 35.9 g
C) 63.8 g
D) 51.9 g
E) 160. g
Answer: A
Page Ref: 7.3
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
25) How many grams of glucose ( ) are in 3.55 moles of glucose?
A) 180. g
B) 640. g
C) 103 g
D) 426 g
E) 50.7 g
Answer: B
Page Ref: 7.3
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
26) How many grams of K2SO4 are there in 0.123 mole of K2SO4?
A) 14.7 g
B) 16.6 g
C) 21.4 g
D) 42.8 g
E) 76.3 g
Answer: C
Page Ref: 7.3
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
27) A chemical equation is balanced when ________.
A) the total number of molecules is the same in reactants and products
B) the total number of ions is the same in reactants and products
C) the sum of the coefficients of the reactants is equal to the sum of the coefficients of the products
D) the number of atoms of each element is the same in reactants and products
E) the charge on each atom is the same in reactants and products
Answer: D
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
28) In any balanced chemical equation, the number of each type of atom on both sides of the equation is ________.
A) doubled
B) the same
C) decreased by one
D) increased by one
E) dependent on the temperature
Answer: B
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
29) Which of the following gives the balanced equation for this reaction? + Ca → +
A) + +
B) + Ca → + 3
C) 2 + Ca → + 6
D) 2 + 3Ca → + 6
E) + Ca → +
Answer: D
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
30) Which of the following correctly gives the correct coefficients for the reaction below? + → + O A)
Answer: B
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
31) What coefficient is placed in front of to complete the balancing of the following equation? + ? → 5 + 4 O
A) 1
B) 3
C) 5
D) 7
E) 9
Answer: D
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
32) What is the coefficient of hydrogen, , when the following equation is balanced? Al + → + ?
A) 1
B) 2
C) 3
D) 4
E) 5
Answer: C
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
Pentane ( ) reacts with oxygen ( ) to form carbon dioxide ( ) and water ( O) according to the following reaction. Answer the following question(s) about this reaction.
+ ? → ? + ? O
33) What is the coefficient for oxygen in the balanced equation?
A) 2
B) 4
C) 5
D) 6
E) 8
Answer: E
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
34) What is the coefficient for carbon dioxide in the balanced equation?
A) 2
B) 4
C) 5
D) 6
E) 8
Answer: C
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
35) What is the coefficient for water in the balanced equation?
A) 2
B) 4
C) 5
D) 6
E) 8
Answer: D
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
36) In this reaction, what is the coefficient for calcium oxide?
CaO + CO2 → CaCO3
A) 1 B) 2
C) 3
D) 4
E) 5
Answer: A
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
37) In this reaction, what is the correct coefficient for sodium chloride?
Pb(N + ? NaCl → PbC + ? NaN
A) 1
B) 2
C) 3
D) 4
E) 5
Answer: B
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
38) In the following reaction, what is the correct coefficient for aluminum chloride?
Al + → Al
A) 1
B) 2
C) 3
D) 4
E) 5
Answer: B
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
39) For the following reaction, what is the correct coefficient for the ?
Fe + HCl → FeC +
A) 1
B) 2
C) 3
D) 4
E) 5
Answer: C
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
40) What is the classification for this unbalanced reaction?
Fe + HCl → FeC +
A) combustion
B) combination
C) decomposition
D) single replacement
E) double replacement
Answer: D
Page Ref: 7.5
Learning Obj.: 7.5
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
41) In a ________ reaction, two or more elements or compounds form one product.
A) decomposition
B) single replacement
C) combustion
D) double replacement
E) combination
Answer: E
Page Ref: 7.5
Learning Obj.: 7.5
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
42) The following reaction is an example of a ________ reaction.
+ 7 → 5 + 4 O
A) combination
B) single replacement
C) combustion
D) decomposition
E) double replacement
Answer: C
Page Ref: 7.5
Learning Obj.: 7.5
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
43) The following reaction takes place when an electric current is passed through water. It is an example of a ________ reaction. O 2 +
A) combination
B) single replacement
C) combustion
D) decomposition
E) double replacement
Answer: D
Page Ref: 7.5
Learning Obj.: 7.5
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
44) What is the classification for this reaction?
S + O → S
A) decomposition
B) combination
C) replacement
D) double replacement
E) combustion
Answer: B
Page Ref: 7.5
Learning Obj.: 7.5
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
45) The reaction of carbon with oxygen to produce carbon monoxide is an example of which class of reaction?
2C + → 2CO
A) single replacement
B) double replacement
C) combination
D) catalytic
E) endothermic
Answer: C
Page Ref: 7.5
Learning Obj.: 7.5
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
46) Which of the following is an oxidation-reduction reaction?
A) Ca + → Ca + 2NaCl
B) KOH + → O +
C) + → 2NO
D) + NaCl → AgCl +
E) + 6KOH → 2 + 3
Answer: C
Page Ref: 7.6
Learning Obj.: 7.6
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
47) What is oxidized and what is reduced in the following reaction?
2Al + 3 → 2
A) Al is oxidized and is reduced.
B) AlBr3 is reduced and is oxidized.
C) Al is reduced and is oxidized.
D) is reduced and Al is oxidized.
E) is oxidized and Al is reduced.
Answer: A
Page Ref: 7.6
Learning Obj.: 7.6
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
48) In an oxidation-reduction reaction, the substance oxidized always ________.
A) takes on oxygen atoms
B) loses electrons
C) gives up hydrogen atoms
D) gains electrons
E) becomes a charged species
Answer: B
Page Ref: 7.6
Learning Obj.: 7.6
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
49) In this reaction, what is the substance oxidized?
Zn + 2 HCl → ZnCl2 + H2
A) chlorine
B) zinc chloride
C) hydrogen
D) zinc
E) oxygen
Answer: D
Page Ref: 7.6
Learning Obj.: 7.6
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
50) In an oxidation-reduction reaction, the substance reduced always ________.
A) takes on oxygen atoms
B) loses electrons
C) gives up hydrogen atoms
D) gains electrons
E) becomes a charged species
Answer: D
Page Ref: 7.6
Learning Obj.: 7.6
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
51) Given the following equation, what is the correct form of the conversion factor needed to convert the number of moles of to the number of moles of produced?
4Fe + 3 → 2
E) Answer: E
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
For the following question(s), consider the following equation.
2Mg + → 2MgO
52) The number of moles of oxygen gas needed to react with 4.0 moles of Mg is ________.
A) 1.0 mole
B) 2.0 moles
C) 3.0 moles
D) 4.0 moles
E) 6.0 moles
Answer: B
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
53) The number of moles of MgO produced when 0.20 mole of reacts completely is ________.
A) 0.10 mole
B) 0.20 mole
C) 0.40 mole
D) 0.60 mole
E) 0.80 mole
Answer: C
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry. For the following question(s), consider the following balanced equation.
+ 6 O → 3 + 2
54) What is the correct form of the conversion factor needed to convert the number of moles of O to the number of moles of produced?
E)
Answer: A
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
55) When 2 moles of are allowed to react, how many moles of O also react?
A) 1 mole
B) 4 moles
C) 6 moles
D) 8 moles
E) 12 moles
Answer: E
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
56) When 4 moles of aluminum are allowed to react with an excess of chlorine gas, , how many moles of aluminum chloride are produced?
2Al + 3 → 2Al
A) 1 mole
B) 2 moles
C) 3 moles
D) 4 moles
E) 5 moles
Answer: D
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
57) In the reaction of nitrogen gas, , with hydrogen gas, , to form ammonia gas, NH3, how many moles of hydrogen are needed to react with two moles of nitrogen? + 3 → 2
A) 2 moles
B) 4 moles
C) 6 moles
D) 8 moles
E) 5.710 moles
Answer: C
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
For the following question(s), consider the following equation.
2Mg + → 2MgO
58) How many grams of magnesium are needed to react with 16 g of ?
A) 0.50 g
B) 1.0 g
C) 12 g
D) 24 g
E) 48 g
Answer: D
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
59) How many grams of MgO are produced when 40.0 grams of react completely with Mg?
A) 40.3 g
B) 50.4 g
C) 60.5 g
D) 101 g
E) 202 g
Answer: D
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
60) How many grams of hydrogen are needed to produce 1.80 g of water according to this equation?
2 + → 2 O
A) 0.101 g
B) 0.180 g
C) 0.201 g
D) 2.01 g
E) 4.02 g
Answer: C
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
61) In the reaction of silver nitrate with sodium chloride, how many grams of silver chloride will be produced from 100. g of silver nitrate when it is mixed with an excess of sodium chloride? The equation for the reaction is below.
AgN + NaCl → AgCl + NaN
A) 107.9 g
B) 169.9 g
C) 84.4 g
D) 0.589 g
E) 58.9 g
Answer: C
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
For the following question(s), consider the following balanced equation.
+ 6 O → 3 + 2
62) When 36.0 g of O react, how many grams of are produced?
A) 34.0 g
B) 10.0 g
C) 5.67 g
D) 11.3 g
E) 102 g
Answer: D
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
63) How many grams of O are needed to produce 150 g of ?
A) 46 g
B) 18 g
C) 130 g
D) 93 g
E) 23 g
Answer: D
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
64) Find the mass of that is produced when 25.0 grams of reacts with HCl according to the following equation.
+ 6HCl → 2 + 3 O
A) 155 g
B) 72.9 g
C) 65.3 g
D) 32.6 g
E) 16.3 g
Answer: C
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
65) How many grams of NO are required to produce 145 g of in the following reaction?
4 + 6NO → 5 + 6 O
A) 186 g
B) 155 g
C) 125 g
D) 129 g
E) 145 g
Answer: A
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
66) How many grams of are produced when 125 g of reacts as shown in the following balanced equation?
4 + 6NO → 5 + 6 O
A) 206 g
B) 257 g
C) 165 g
D) 7.35 g
E) 145 g
Answer: B
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
67) How many grams of are produced from 125 g of and excess ? + 2 → + 2 O
A) 125 g
B) 62.5 g
C) 172 g
D) 85.9 g
E) 250. g
Answer: D
Page Ref: 7.9
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
68) The ________ is the minimum energy needed for a chemical reaction to begin.
A) reaction energy
B) activation energy
C) energy of reactants
D) energy of products
E) heat of reaction
Answer: B
Page Ref: 7.9
Learning Obj.: 7.9
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
69) A reaction that releases energy as it occurs is classified as a(n) ________.
A) endothermic reaction
B) exothermic reaction
C) oxidation-reduction reaction
D) catalyzed reaction
E) decomposition reaction
Answer: B
Page Ref: 7.9
Learning Obj.: 7.9
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
70) What type of reaction is: + 2 → + 2 O + 218 kcal?
A) an endothermic reaction
B) an exothermic reaction
C) a single replacement reaction
D) a combination reaction
E) a decomposition reaction
Answer: B
Page Ref: 7.9
Learning Obj.: 7.9
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
71) If the reaction shown below is exothermic, the energy level of the reactants is ________.
A) lower than that of the products
B) higher than that of the products
C) the same as that of the products
D) possibly lower, possibly higher than that of the products
E) higher than the activation energy of the reaction
Answer: B
Page Ref: 7.9
Learning Obj.: 7.9
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
72) Any reaction that absorbs 150 kcal of energy can be classified as ________.
A) endothermic
B) exothermic
C) activated
D) reduction
E) oxidation
Answer: A
Page Ref: 7.9
Learning Obj.: 7.9
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
73) The ________ is the energy difference between reactants and products in a chemical reaction.
A) transition energy
B) activation energy
C) product energy
D) overall energy
E) heat of reaction
Answer: E
Page Ref: 7.9
Learning Obj.: 7.9
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
7.2 Bimodal Questions
1) In this reaction, what is the correct coefficient for hydrogen gas?
? H2 + ? O2 → ? H2O
A) 1
B) 2
C) 3
D) 4
E) 5
Answer: B
Page Ref: 7.3
Learning Obj.: 7.4
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
Barium chloride and sodium sulfate react according to the following equation.
BaCl2 + Na2SO4 → BaSO4 + 2NaCl
Answer the following question(s) about this reaction.
2) How many moles of barium sulfate are produced from 0.1 mole of barium chloride?
A) 0.01 mole
B) 0.1 mole
C) 0.2 mole
D) 1 mole
E) 2 moles
Answer: B
Page Ref: 7.6
Learning Obj.: 7.6
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
3) How many grams of sodium chloride can be produced from 50. grams of barium chloride?
A) 2.0 g
B) 14 g
C) 28 g
D) 59 g
E) 208 g
Answer: C
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
4) How many grams of barium chloride are needed to make 100. grams of barium sulfate?
A) 44.9 g
B) 89.2 g
C) 208 g
D) 233 g
E) 46.6 g
Answer: B
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
Answer the question(s) below about the following reaction.
2 → 2 O +
5) This is an example of a ________ reaction.
A) combustion
B) combination
C) decomposition
D) single replacement
E) double replacement
Answer: C
Page Ref: 7.4
Learning Obj.: 7.4
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
6) How many moles of oxygen gas can 5.0 moles of hydrogen peroxide ( H2O2) produce, if decomposition is complete?
A) 5.0 moles
B) 2.5 moles
C) 1.0 mole
D) 2.0 moles
E) 10. moles
Answer: B
Page Ref: 7.6
Learning Obj.: 7.7
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
7) How many grams of water will 100. grams of hydrogen peroxide produce?
A) 36.0 g
B) 360. g
C) 5.88 g
D) 53.0 g
E) 106 g
Answer: D
Page Ref: 7.7
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
8) How many grams of hydrogen peroxide are needed to produce 25.0 g of oxygen?
A) 106 g
B) 26.6 g
C) 5.88 g
D) 25.0 g
E) 53.2 g
Answer: E
Page Ref: 7.7
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
9) How many moles of hydrogen peroxide (H2O2) are needed to produce 5.0 moles of water?
A) 1.0 mole
B) 2.0 moles
C) 2.5 moles
D) 4.0 moles
E) 5.0 moles
Answer: E
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
7.3 Short Answer Questions
1) The number of particles in 1 mole of hydrogen gas is ________.
Answer: 6.02 ×
Page Ref: 7.1
Learning Obj.: 7.1
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
2) The molar mass of copper(II) nitrate, Cu(N is ________.
Answer: 187.6 g
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
3) What is the mass, in grams, of 1.00 mole of argon gas?
Answer: 40.0 g
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
4) The mass of 0.234 moles of copper(II) chloride, CuCl2 is ________.
Answer: 46.3 g
Page Ref: 7.3
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
5) The moles of NH3 in 55.5 g of NH3 is ________.
Answer: 3.26 moles
Page Ref: 7.3
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
6) When the following equation is balanced, the coefficient of O2 is ________.
CH4 + O2 → CO2 + O
Answer: 2
Page Ref: 7.4
Learning Obj.: 7.3
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
7) When the following equation is balanced, the coefficient of O2 is ________.
C2H6 + O2 → CO2 + O
Answer: 7
Page Ref: 7.4
Learning Obj.: 7.3
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
8) What type of reaction is the following?
2KCl → 2KCl + 3
Answer: decomposition
Page Ref: 7.5
Learning Obj.: 7.5
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
9) What type of reaction is the following?
Zn + 2HCl → Zn +
Answer: single replacement
Page Ref: 7.5
Learning Obj.: 7.5
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
10) What type of reaction is the following?
2 + 5 → 4C + O
Answer: combustion
Page Ref: 7.5
Learning Obj.: 7.5
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
11) Which reactant is oxidized in the following reaction?
Zn + 2HCl → Zn +
Answer: Zn
Page Ref: 7.6
Learning Obj.: 7.6
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
12) Acetylene gas, , reacts with oxygen according to the following equation. If 1 mole of acetylene react completely with sufficient oxygen, how many moles of carbon dioxide are produced?
2 + 5 → 4C + O
Answer: 2 moles
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
13) When 25.0 g of KCl reacts, how many grams of O2 are produced?
2KCl → 2KCl + 3
Answer: 9.79 g
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
14) Is the following reaction exothermic or endothermic?
2C2H6 + 7O2 → 4CO2 + 6 O +1300 kJ
Answer: exothermic
Page Ref: 79
Learning Obj.: 7.9
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
7.4 True/False Questions
1) Avogadro's number is the number of grams in a mole.
Answer: FALSE
Page Ref: 7.1
Learning Obj.: 7.1
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
2) The molar mass of silver is 47 g/mole.
Answer: FALSE
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
3) The molar mass of magnesium is 24.31 g/mole.
Answer: TRUE
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
4) The molar mass of water is 18.02 g.
Answer: TRUE
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
5) The molar mass of chlorine gas is 35.45 g/mole.
Answer: FALSE
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
6) The molar mass of copper(II) chloride is 134.5 g/mole.
Answer: TRUE
Page Ref: 7.2
Learning Obj.: 7.2
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
7) The mass of 0.352 mole of sodium chloride is 20.6 g.
Answer: TRUE
Page Ref: 7.2
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
8) The mass of 1.57 moles of calcium nitrate is 25.8 g.
Answer: FALSE
Page Ref: 7.2
Learning Obj.: 7.3
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
9) The following reaction is correctly balanced.
KCl → KCl +
Answer: FALSE
Page Ref: 7.4
Learning Obj.: 7.3
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
10) The following reaction is correctly balanced.
2 + 5 → 4C + O
Answer: TRUE
Page Ref: 7.4
Learning Obj.: 7.3
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
11) The following is a decomposition reaction.
2KCl → 2KCl + 3
Answer: TRUE
Page Ref: 7.5
Learning Obj.: 7.5
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
12) The following is a double replacement reaction.
2 + 5 → 4C + O
Answer: FALSE
Page Ref: 7.5
Learning Obj.: 7.5
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
13) In the following reaction Al is oxidized.
2Al + 3 → 2
Answer: TRUE
Page Ref: 7.6
Learning Obj.: 7.6
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
14) In the following reaction C is reduced.
2C + → 2CO
Answer: FALSE
Page Ref: 7.6
Learning Obj.: 7.6
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.
15) In the reaction of hydrogen gas with oxygen gas to produce water, 1 mole of oxygen gas can produce 2 moles of water, given sufficient hydrogen available.
Answer: TRUE
Page Ref: 7.7
Learning Obj.: 7.7
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
16) In the following reaction, 20.0 g of Al will react completely with 30.0 g of Br2
2Al + 3 → 2
Answer: FALSE
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
17) In the following reaction, when 100. g of Br2 reacts, 111 g of AlBr3 is formed.
2Al + 3 → 2
Answer: TRUE
Page Ref: 7.8
Learning Obj.: 7.8
Global Outcomes: G4 Demonstrate the quantitative skills needed to succeed in chemistry.
18) The following reaction is endothermic.
2 + 5 → 4C + O + 310 kcal
Answer: FALSE
Page Ref: 7.9
Learning Obj.: 7.9
Global Outcomes: G7 Demonstrate the ability to make connections between concepts across chemistry.