Find answers to your questions faster and easier with IDNLearn.com. Ask your questions and receive comprehensive, trustworthy responses from our dedicated team of experts.

It takes 42.0 minutes for the concentration of a reactant in afirst-order reaction to drop from 0.45 M to 0.32 M at 25 deg C. Howlong will it take for the reaction to be 90% complete?
A. 13.0 minutes
B. 86.0 minutes
C. 137 minutes
D. 222 minutes
E. 284 minutes