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28 January, 02:39

How much of a 100.0 g sample of 198au is left after 8.10 days ifi its half life is 2.70 days?

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  1. 28 January, 05:51
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    8.10 days / 2.70 days = 3 half-lives; divide 100 by 2, three times to get 12.5 g left after 3 half-lives
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