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

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The Answer of It takes 42.0 min for the concentration of a reactant in a first-order reaction to drop from 0.45 M to 0.32 M at 25°C.How long will it take for the reaction to be 90% complete?
A)13.0 min
B)86.0 min
C)137 min
D)222 min
E)284 min

It Takes 42