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13-10-2017
Chemistry

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Phosphorus-24 has a half-life of 14.3 days. What percent of phosphorus-24 is left after 144 hours?

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ahmedishaal ahmedishaal

21-10-2017

Half life of phosphorus-24 = 14.3 days
percent of phosphorus-24 left after 144 hours = ?
144 hours = 144/24 = 6 days
6 days/ 14.3 days = 0.42
(1/2)∧0.42 = 0.747
percent left = 0.747 x 100 = 74.7%

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