AnswersCR03101 ChemistryUnit Test

Unit Test — Unit test Answers

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21
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Which statement describes a homogeneous catalyst?

A
It is in a gaseous phase only.
B
It is in the same phase as the reactants.
C
It is completely consumed by reactants.
D
It forms different products than the uncatalyzed reaction forms.
22
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This formula equation is unbalanced.Pb(NO3)2(aq) + Li2SO4(aq) PbSO4(s) + LiNO3(aq) Which coefficient should appear in front of LiNO3 in the balanced equation?

Question illustration
A
1
B
2
C
3
D
4
23

Consider the unbalanced equation for the oxidation of butene.C4H8 + 6O2 CO2 + H2OFor each molecule of C4H8 that reacts, how many molecules of carbon dioxide and water are produced?

Question illustration
A
two carbon dioxide molecules and two water molecules
B
four carbon dioxide molecules and four water molecules
C
two carbon dioxide molecules and four water molecules
D
four carbon dioxide molecules and two water molecules
24

Consider the reaction.At equilibrium, the concentrations are as follows.[NOCl] = 1.4 ´ 10–2 M[NO] = 1.2 ´ 10–3 M[Cl2] = 2.2 ´ 10–3 MWhat is the value of Keq for the reaction expressed in scientific notation?

Question illustration
A
1.6 ´ 10–5
B
6.2 ´ 10–4
C
6.2 ´ 104
D
1.6 ´ 105
25

Consider the following reversible reaction.What is the equilibrium constant expression for the given system?

Question illustration
A
k subscript e q equals StartFraction StartBracket upper H subscript 2 upper O EndBracket over StartBracket upper H subscript 2 EndBracket StartBracket upper O subscript 2 EndBracket EndFraction.
Option A
B
k subscript e q equals StartFraction StartBracket upper H subscript 2 upper O EndBracket superscript 2 over StartBracket upper H subscript 2 EndBracket superscript 2 StartBracket upper O subscript 2 EndBracket EndFraction.
Option B
C
K subscript e q equals StartFraction StartBracket upper H subscript 2 EndBracket superscript 2 StartBracket upper O subscript 2 EndBracket over StartBracket upper H subscript 2 upper O EndBracket EndFraction.
Option C
D
K subscript e q equals StartFraction StartBracket upper H subscript 2 EndBracket superscript 2 StartBracket upper O subscript 2 EndBracket over StartBracket upper H subscript 2 upper O EndBracket superscript 2 EndFraction.
Option D

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Unit Test — Unit test Answers — CR03101 Chemistry