54. This reaction was monitored as a function of time: ABA+B A plot of 1/[AB] versus time yields a straight line with a slope of +0.55/Ms. a. What is the value of the rate constant (k) for this reaction at this temperature? b. Write the rate law for the reaction. c. What is the half-life when the initial concentration is 0.55M ? d. If the initial concentration of AB is 0.250M and the reaction mixture initially contains no products, what are the concentrations of A and B after 75s