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M/s=(M2s1)(M3) For a second-order reaction, the rate constant has units of M1+81 because Learning Goal: M/s=(M1+s1)(M2). In a first-order reaction, the rate constant has the units s1 To understand reaction order and rate constants because M/s=(s1)(M1). For the general equation aA+bBcC+dD. the rate law is expressed as follows: rate=kA]m[B]n Analyzing a specific reaction Consider the following reaction: where m and n indicate the order of the reaction O2+2NO2NO2. with respect to each reactant and must be defermined experimentally and k is the rate constant, which is specitic to each reaction. Part A What is the overall reaction order? Express your answer as an integer