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CHM 2045C: Spring Term 2008
Practice Final (Spring 1998's Test)
Module Five

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Module Five

Module 5 Test Masters:

Mary Alcott (

Juliana Allebach (

John Taylor ( [Template Author]

Multiple Choice [One Answer Only]

Question 1

How many Krypton atoms are in 2.50 mol of Kr gas?
a) 1.51 X 1022 atoms
b) 1.51 X 1023 atoms
c) 1.51 X 1024 atoms
d) 2.41 X 1024 atoms

Question 2

How many moles of bromine correspond to 1.51 X 1024 Br2 molecules?

a) 0.251 mol
b) 0.399 mol
c) 2.51 mol
d) 3.99 mol
e) 25.1 mol

Question 3

What is the molar mass of aspirin, C9H8O4?

a) 116.0 g/mol
b) 180.0 g/mol
c) 188.0 g/mol
d) 244.0 g/mol

Question 4

Phenacyl chloride is a riot control gas having the formula C7H7OCl. What is the percentage of carbon in the compound.

a) 4.91%
b) 8.42%
c) 11.2%
d) 24.9%
e) 58.9%

Question 5

If 0.250 mol of Cr combines with 0.375 mol of O, what is the empirical formula of chromium oxide?

a) CrO
b) Cr2O3
c) Cr2O5
d) Cr3O2
e) Cr5O2

Question 6

What are the standard conditions of temperature and pressure for a gas?

a) 0 oC and 0 atm
b) OoC and 1 atm
c) O K and 1 atm
d) 273oC and 1 atm
e) 273 K and 0 atm

Question 7

What is the coefficient of hydrogen after balancing the following equation?

___N2(g) + ___H2(g) --> __NH3(g)

a) 1
b) 2
c) 3
d) 4
e) none of the above

Question 8

What is the coefficient of hydrogen after balancing the following equation?

__Pb(s) + __HNO3(aq) --> __Pb(NO3)4(aq) + __H2(g)

a) 1
b) 2
c) 3
d) 4
e) none of the above

Question 9

Which of the following metals reacts with aqueous FeSO4?

Partial Activity Series: Fe > Co > (H) > Cu > Ag

a) Co
b) Cu
c) Ag
d) All of the above
e) none of the above

Question 10

What are the products from the following neutralization reaction?

HNO3(aq) + Ba(OH)2(aq) -->

a) Ba3N2 and H2O
b) Ba(NO2)2 and H2
c) Ba(NO2)2 and H2O
d) Ba(NO3)2 and H2
e) Ba(NO3)2 and H2O

Question 11

What is the term for a substance that increases the rate of a chemical reaction?

a) accelerator
b) catalyst
c) inhibitor
d) reactant
e) none of the above

Question 12

What term refers to an insoluble substance produced by a reaction in aqueous solution?

a) colloid
b) precipitate
c) product
d) salt
e) none of the above

Question 13

Octane, C8H18, is a major component in gasoline. What is the coefficient of oxygen in the balanced equation for the combustion of octane?

__C8H18(g) + __O2(g) --> __CO2(g) + __H2O(g)

a) 17
b) 25
c) 34
d) 50
e) none of the above

Question 14

How many moles of oxygen are produced from the decomposition of O.250 mol of hydrogen peroxide according to the following reaction?

__H2O2(l) --> __H2O(l) + __O2(g)

a) 0.125 mol
b) 0.250 mol
c) 0.500 mol
d) 1.00 mol
e) none of the above

Question 15

Calculate the mass of insoluble calcium phosphate (310.3 g/mol) produced from the reaction of 0.555g of calcium chloride (111.1 g/mol)

__CaCl2(s) + __Na3PO4(aq) --> __Ca3(PO4)2(s) + __NaCl(aq)

a) 0.0662 g
b) 0.517 g
c) 0.596 g
d) 1.55 g
e) 4.65 g

Question 16

Which of the following strategy maps illustrates mass-mass stoichiometry?

a) g reactant --> g product --> mol product --> mol reactant
b) g reactant --> mol product --> mol reactant --> g product
c) g reactant --> mol product --> g product --> mol reactant
d) g reactant --> mol reactant--> g product --> mol product
e) g reactant --> mol reactant--> mol product --> g product

Question 17

Given the three-step "blast furnace" process that converts iron ore, Fe2O3, into molten "pig iron":

3 Fe2O3(s) + CO(g) --> 2 Fe3O4(s) + CO2(g)

Fe3O4(s) + CO(g) --> 3 FeO(s) + CO2(g)

FeO(s) + CO(g) --> Fe(l) + CO2(g)

How many moles of iron are produced from the reaction of 6.00 mol of Fe2O3?

a) 3.00 mol
b) 4.00 mol
c) 6.00 mol
d) 12.0 mol
e) none of the above

Question 18

Given the three-step Ostwald process for manufacturing Nitric Acid, HNO3:

4 NH3(g) + 5 O2(g) --> 4 NO(g) + 6 H2O(g)

2 NO(g) + O2(g) --> 2 NO2(g)

3 NO2(g) + H2O(l) --> 2 HNO3(aq) + NO(g)

What mass of ammonia is required to produce 75.0 g HNO3?

a) 13.5 g
b) 15.2 g
c) 20.2 g
d) 27.0 g
e) 30.4 g

Question 19

If 0.600 mol of A reacts with 1.00 mol B according to the following equation, how may moles of C are produced?
A(g) + 2B(g) --> 3C(g)

a) 0.667 mol
b) 1.50 mol
c) 1.60 mol
d) 1.80 mol
e) 3.30 mol

Question 20

What is the term for the substance in a chemical reaction that controls or limits the maximum amount of product formed?

a) limiting reactant
b) maximum product
c) maximum reactant
d) minimum product
e) minimum reactant

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Module 6: Gas Laws and Applications

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