The rate of this reaction is first order in each reactant. the rate constant for the disappearance of h2s at 28C is 3.5 x 10-2m-1s-1. if at a given time the concentration of h2s is 1.7 x 10-4M and of cl2 is 4.2 x 10 -2 M, what is the rate of formation of Cl2?