Discover how IDNLearn.com can help you find the answers you need quickly and easily. Join our platform to receive prompt and accurate responses from experienced professionals in various fields.

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