The rate constant for the first-order decomposition of N205 in the reaction 2 N205(g) → 4 NO2(g) + O2(g) is k = 3.38 X 10-5 s-1 at 25°C. What is the half-life of N205? S If the initial partial pressure of N205 is 500 Torr, what will its partial pressure be at the following times after initiation of the reaction? (a) 39 s Torr

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