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At a certain temperature the rate of this reaction is first order in NH4OH with a rate constant of 0.0163 s^-1: NH4OH(aq) →NH3(aq) + H2O(aq) Suppose a vessel contains NH4OH at a concentration of 0.840 M. Calculate how long it takes for the concentration of NH4OH to decrease to 0.101 M. you may assume no other reaction is important. Round your answer to 2 significant digits.