The gas phase decomposition of dinitrogen pentoxide at 335 K N205(g)2 NO2(g) + 2 02(g) is first order in N205. During one experiment it was found that when the initial concentration of N,05 was 7.50x10-2 M, the concentration of N205 dropped to 2.09x10-2 M after 198 s had passed. Based on this experiment, the rate constant for the reaction is -1

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