State concentration of reactant in the first order reaction

Reference no: EM13533816

It takes 42 min for the concentration of a reactant in the first order reaction to drop from .45 M to .32 M at 25 degrees celcius. How long will it take for the reaction to be 90% complete.

A. 13 min
B. 86 min
C. 137 min
D. 222 Min
E. 284 min

Reference no: EM13533816

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