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6 January, 18:50

Phosphorus-32 is radioactive and has a half life of 14.3 days. What percentage of a sample would be left after 12.6 days

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  1. 6 January, 21:48
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    There is 54.29 % sample left after 12.6 days

    Explanation:

    Step 1: Data given

    Half life time = 14.3 days

    Time left = 12.6 days

    Suppose the original amount is 100.00 grams

    Step 2: Calculate the percentage left

    X = 100 / 2^n

    ⇒ with X = The amount of sample after 12.6 days

    ⇒ with n = (time passed / half-life time) = (12.6/14.3)

    X = 100 / 2^ (12.6/14.3)

    X = 54.29

    There is 54.29 % sample left after 12.6 days
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