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Find the rate of the reaction.

C2H4(g) + O3(g) ↔ C2H4O(g) + O2(g)
a. The concentration of C2H4(g) in beginning of the reactions is 3.20X10-5M. After 25 seconds the concentration is 1.48X10-5M. What is the rate of the reaction?

b. The concentration of O2(g) after 15 seconds is 1.23x10-5M. At 60 seconds the concentration is 2.42X10-5M. What is the rate of the reaction?

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