How long will it take for the reaction to be 63% complete?

Question

At a given temperature, a first-order reaction has a rate constant of 3.4 × 10-3 s-1. How long will it take for the reaction to be 63% complete?

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Answer 1

Best Answer - Chosen by Asker

ln(100/37) = 3.4x10^-3 x t
t = 292 seconds (290 sec, 2 s.f.)

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Asker's Comment:

thanks!!