Benzoyl peroxide (C14H10O4) is widely used in acne treatments. It degrades by 1st-order kinetics and has a half-life of 9.8×103 days at 25 °C. (a) What is the rate constant for this reaction at 25 °C?  (b) How many years will it take for 10% of the benzoyl peroxide to degrade?

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