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A Certain First-Order Reaction A →\rarr B Is 25% Complete in 42 Min at 25

Question 14

Multiple Choice

A certain first-order reaction A →\rarr B is 25% complete in 42 min at 25 ∘\circ C. What is the half-life of the reaction


A) 21 min
B) 42 min
C) 84 min
D) 20 min
E) 101 min

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