According to the reaction 2N2O5(g) 4NO2(g) + O2(g), the rate constant for the decomposition of N2O5 at 25C is k = 3.38 x 10-5 s-1. Determine the order of the N2O5 decomposition reaction and the half-life. Given that the initial pressure is 500 Torr, calculate the pressure (a) 10 seconds and (b) 10 minutes after the start of the reaction.