Radioactive decay is a process that follows first-order kinetics. The half-life of 36Cl is 3.000e+5 years; how long (in hours) would it take for the amount of 36Cl to decrease to 66.45% of its initial amount? Key Concept: Half-life for first order reaction. t½ = 0.693/k.

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Radioactive decay is a process that follows first-order kinetics. The half-life of 36Cl is 3.000e+5 years; how long (in hours) would it take for the amount of 36Cl to decrease to 66.45% of its initial amount?

Key Concept: Half-life for first order reaction. t½ = 0.693/k.
Strategy: Determine rate constant and then calculate time using integrated first order rate law

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