At a certain temperature the rate of this reaction is second order in NH4OH with a rate constant of 0.0770M NH4OH (aq) → NH3, (aq) + H₂O (aq) Suppose a vessel contains NH4OH at a concentration of 0.500M. Calculate how long it takes for the concentration of NH4OH to decrease by 77.0%. You may assume no other reaction is important. Round your answer to 2 significant digits.

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