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timofeeve [1]
3 years ago
7

what is the half life isotope if after 21 days you have 31.25 g remaining from a 250.0 g starting sample size?

Chemistry
1 answer:
alexgriva [62]3 years ago
3 0

250 --> 125 --> 62.5 --> 31.25


each arrow equals one half life, so 3 half lives


14 days/ 3 half lives =


4.67 days = half life

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