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How much of a 20-g sample of radon-222 will remain after eight days?
Wiki User
∙ 12y ago
reference table N: Half Life of Rn-222 is 3.823d
=
8/3.823 = # of Half lives = 2.09 (roughly 2)
20g-> 40g-> 80g
doesn't say anything about decay so assume to increase since how much will remain in 8days
Ans: 80g
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∙ 12y ago
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