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Chemistry, 21.05.2021 08:20 nightcorerules5

What is the half-life of a 12 g sample of radioisotope that decayed to 6 g in 28 years?
A. 28 years
B. 14 years
C. 56 years
D. 7 years

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What is the half-life of a 12 g sample of radioisotope that decayed to 6 g in 28 years?
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