Chemistry: Matter and Change

Section 1: A Model for Reaction Rates

Self Check Quizzes

1
Which of the following is the theory that states that atoms, molecules, and ions must collide for a chemical reaction to occur?
A)collision theory
B)accident theory
C)reaction theory
D)mechanism
2
Chemical A breaks down into chemical B. At t=0, [A] = 0.100 M. At t=10.0 s, [A] = 0.075 M. What is the average reaction rate?

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A)0.0925 mol/Ls
B)0.0975 mol/Ls
C)0.0025 mol/Ls
D)0.25 mol/Ls
3
How much time has passed when 5 mol/L have reacted at an average rate of 0.5 mol/L·s?
A)1.0 s
B)10 s
C)100 s
D)0.1 s
4
What is the name of the unstable molecule formed during the collision of A2 and B2?

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A)product
B)reactant
C)activated complex
D)diatomic molecule
5
Activation energy is ________.

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A)the energy released by a chemical reaction.
B)the energy absorbed by a chemical reaction.
C)the energy reacting particles must have to form the activated complex
D)the energy produced by the combustion of the reactants
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