The decomposition of A to produce B can be written as A B. (a) When the initial concentration of A is 0.012 M, the rate is 0:0018 M min-1 and when the initial concentration of A is 0.024 M, the rate is 0:0036 M min-1. Write the rate law for the reaction. (b) If the activation energy for the reaction is 268 kJ mol-1 and the rate constant at 660 K is 8.1*10^-3 sec-1 what will be the rate constant at 690 K?