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At 500 ∘ C , cyclopropane ( C 3 H 6 ) rearranges to propene (...

At 500 ∘ C , cyclopropane ( C 3 H 6 ) rearranges to propene ( CH 3 −CH= CH 2 ). The reaction is first order, and the rate constant is 6.7× 10 −4 s −1 . If the initial concentration of C 3 H 6 is 5.50×10−2 M . Part A Part complete What is the half-life (in minutes) of this reaction? Express your answer using two significant figures. t 1/2 = 17 min SubmitPrevious Answers Correct Part B How many minutes will it take for the concentration of cyclopropane to drop to 12.5% of its initial value? Express your answer using two significant figures. t t = 69 min

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