At 25°C, the second-order reaction NOCl(g) --> NO(g) + 1/2Cl2(g) is 50.0% complete after 5.82 hours when the initial concentration of NOCl is 4.46 mol/L. How long will it take for the reaction to be 75.0% complete? (Answer in hours to 3 sig figs) (Hint: This is 2 half lives but they aren't the same length of time because it is second order. Find K to find the second t1/2 . Then add them together.)

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