The reaction 2A + 2B → M+ N has the rate law: Rate = k[A]?. At 25°C, k = 0.0107 L mol 1 s-1. If the initial concentrations of A and B are 0.314 M and 0.582 M, respectively Your answer is correct. (a) What is the half-life of the reaction? 297. seconds Hint Assistance Used Your answer is partially correct. (b) What will be the concentrations of A and B after 30.0 minutes? [A] = 0.0446 M [B] = 0.048 ! M

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