Suppose a small lake is contaminated with an insecticide that decomposes with time. An analysis done in June shows the decomposition product concentration to be 3.13 x 10-4 mol/L. An analysis done 35 days later shows the concentration of decomposition product to be 7.33 x 10-4 mol/L. Assume the lake volume remains constant and calculate the average rate of decomposition of the insecticide.
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