A certain reaction a ® products, is second order with respect to a. if it takes 45 min to reduce the molar concentration of a from 0.350 m to 0.125 m, what is the rate constant for this reaction? include the correct units with your answer? a) 0.005 M/min b) 0.010 M/min c) 0.015 M/min d) 0.020 M/min