What was the initial reactant concentration for the reaction described in part a? express your answer with the appropriate units. indicate the multiplication of units, as necessary, explicitly either with a multiplication dot or a dash. view available hint(s) hint 1. how to approach the problem opened hint use the integrated rate law for zero-order reactions [a]=−kt+[a]0 to solve for [a]0. values for [a] and t are given in part a, and your answer to part a was the value of k. you can use either data point given in part a to complete the calculation, however the corresponding time t and concentration [a] must be used together. [a]0 = previous answersrequest answer incorrect; try again use the integrated rate law for a zero-order reaction, and the values given in part a. you also calculated k in part a. keep in mind that the term is −kt, which will impact the addition and subtractions of terms as you solve for [a]0.