18. Thermal decomposition of cyclobutanone leads to the formation of a mixture of products, according to the reaction
C8H12O2→k1 2C2H4 2C2H2 O2
C8H12O2→k2 2C3H6 2CO
The initial amount of cyclobutanone is 10 mol. At a temperature of 383 K, the ratio of the concentrations of C2H4 and C3H6 at any time during the process remained constant and equal to 125. After 50 s from the start of the reaction, the gas mixture contained 0.7 moles of CO. Calculate the rate constants for both processes.

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