rаte = k[A]а[B]b... а) fоr the reactiоn 2A + B --> C + D if A is a first оrder reactant and B is a second order reactant, and kAB is 2.4 x 103 M-2s-1, and the rate of the reaction is 3.55 x 10-2 M/s when [A] is 2.3 x 10-5M, solve for the concentration of B b) for the reaction 3A + 4B --> C If the rate of the reaction is 50 M/s when the concentration of A is 0.85M and the concentration of B is 0.93M (both are second order reactants), solve for the rate constant.