Suppose the experimental rate law for the reaction in Practice Problem 13.24 is: Rate = k[Y₂] Suppose also that the first step in the mechanism is the rate-determining step. What might this first step look like?

Data from Problem 13.24

Suppose the experimental rate law for the reaction X₂ + Y₂ → 2XY is: Rate = k[X₂][Y₂] A student postulates a multistep mechanism in which the first step is the rate-determining step. For this step, he postulates 2Y₂ → Y₃ + Y. Is it possible for this to be the rate-determining step?