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You are given 500 grams of a substance with a half-life of 1.5 years. How much will remain after 15.0 years?

1 Answer

Jul 29, 2016

$0.488$ $0.488$ grams

Explanation:

$15.0$ $15.0$ years is $10$ $10$ times the half life, so the amount of the substance remaining will be:

$\frac{500 g}{2^{10}} = \frac{500 g}{1024} \approx 0.488 g$ $(500"g")/2^10 = (500"g")/1024 ~~ 0.488"g"$

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