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9 August, 15:26

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

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  1. 9 August, 17:08
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    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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