The rate law expression for the reaction A + 2B C, given that it is second order with respect to A and first order with respect to B, can be written as:Rate = k[A]^2[B]^1where Rate is the reaction rate, k is the rate constant, [A] is the concentration of A, and [B] is the concentration of B.The overall order of the reaction is the sum of the individual orders with respect to each reactant. In this case, it is:Overall order = 2 order with respect to A + 1 order with respect to B = 3