happyjamandnut5621 happyjamandnut5621 22-03-2024 Chemistry contestada It takes 42.0 mni for the concentration of a reactant ni a first-order reaction ot drop from 0.45 mot 03.2 mat 25°C. How olng wil ti take for the reaction ot be 90% complete? a) 130 minb) 86 min c) 137 min d) 284 min