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    Chemistry Study Set 8
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    Exam 14: Chemical Kinetics
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    A Certain First-Order Reaction a → B Is 25% Complete
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A Certain First-Order Reaction a → B Is 25% Complete

Question 122

Question 122

Multiple Choice

A certain first-order reaction A → B is 25% complete in 42 min at 25°C. What is the half-life of the reaction?


A) 21 min
B) 42 min
C) 84 min
D) 120 min
E) 101 min

Correct Answer:

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