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1.The half-life for the reactant A in the first order reaction A → B is 36.2 seconds. What is the rate constant for this reaction at the same temperature? 2. The rate constant for the second order reaction 2NO2 → N2O4 is 2.79 L/mol·min at 48°C. If the initial concentration of NO2 is 1.05 M. What is the half-life? 3. The decomposition of dinitrogen pentoxide obeys the rate-law expression rate = 0.080 min-1 [N2O5]. If the initial concentration of N2O5 is 0.30 M; What is the concentration after 2.6 minutes? N2O5 → N2O3 + O2 4. A chemical reaction A → B + C is first order in A and has a rate constant of 1.2 x 10-3 min-1 . If the initial concentration of A is 0.40 M, how much time must pass in order to reduce the concentration of A to 0.22 M
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