[4]. The second-order reaction, has a rate constant equal to 3.0 x at 25℃. If the initial concentrationM, how long will it take for 90.% of the reactant to disappear?
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, has a rate constant equal to 3.0 x 
at 25℃. If the initial concentration
M, how long will it take for 90.% of the reactant to disappear?