Odine-131 has a half-life of 8.04 days. How many grams of a 500 g sample will remain after 35 days? Round your answer to the nearest hundredth of a gram.

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Mathematics

Weston Willis

4 June, 18:27

Odine-131 has a half-life of 8.04 days. How many grams of a 500 g sample will remain after 35 days? Round your answer to the nearest hundredth of a gram.

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Zackary Ballard · Answer 1

35/8.04=4.353234 approx. So there are this many half-life periods. The iodine sample halves its size for every period. So we need to calculate 0.5 to this power=0.0489 approx. Multiply this by 500=24.46g.