At a certain temperature the rate of this reaction is second order in N₂O, with a rate constant of 0.68M 2N₂O, (g) → 2N₂O4 (8) + O₂(g) Suppose a vessel contains N₂O, at a concentration of 0.400M. Calculate how long it takes for the concentration of N₂O5 to decrease to 0.032M. You may assume no other reaction is important. Round your answer to 2 significant digits. s X ? S

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