4.1: For the reaction R → P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and seconds.

=-Rt
=-R2Rt2-t1
=-0.02-0.0325Mmin-1
=--0.0125Mmin-1
=4×10-4Mmin-1
=4×10-460Ms-1
=6.67×10-6Ms-1