2.8b A second-order reaction of the type A + 2 B → P was carried out in a solution that was initially 0.075 mol dm−3 in A and 0.030 mol dm−3 in B. After 1.0 h the concentration of A had fallen to 0.045 mol dm−3 . (a) Calculate the rate constant. (b) What is the half-life of the reactants?

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