The first-order decay of radon has a half-life of 3.823 days.How many grams of radon remain after 7.22 days if the sample initially weighs 250.0 grams?

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Quizplus · Accepted Answer

The decay of radon follows first-order kinetics. After 7.22 days, which is approximately 1.89 half-lives (7.22/3.823), the remaining amount is calculated using the formula: remaining amount = initial amount * (1/2)^(time/half-life). Thus, 250 * (1/2)^1.89 ≈ 67.5 grams.

The First-Order Decay of Radon Has a Half-Life of 3