The second-order reaction 2 Mn(CO)5 Mn2(CO)10, has a rate constant equal to 3.0 x 10° M-1s1 at 25°C. If the initial concentration of Mn(CO)5 is 2.0 x 10 M, how long will it take for 90.% of the reactant to disappear? 6.0 × 10° s 15 7.4 x 10 O 15 × 10s 1.5 x O 67x 10-10 s

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