A second-order reaction of the type A+2B -> P was caried out in a solution that was initally 0.075mol L^-1 in A and 0.030 mol L^-1 in B. Afer 1.0 h the concentration of A had fallen to 0.045 mol L^-1.
(a) Calculate the rate constant
(b) What is the half-life of the reactants?