3. The first order rate constant for the decomposition of N2O5 at 70°C is 6.82x10-³s-!. N2O5 → 2NO2 + ½ O2 (a) Suppose the reaction starts with 0.0300 mol of N2O5(g) How many moles of N2O5 will remain after 2.5 min. (b) How many minutes will it take for the quantity of N2O5 to drop to 0.0500 mol? (c) What is the half-life of N2O5 at 70°C?

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