Radon-222 has a half-life of 4.00 days. Given its mass 3.168 gram at a certain time, what was the sample's mass (in gram) before 0.7 month? 1 month is about 30.5 days.

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Radon-222 has a half-life of 4.00 days. Given its mass 3.168 gram at a certain time,
what was the sample's mass (in gram) before 0.7 month?
1 month is about 30.5 days.
Transcribed Image Text:gs Radon-222 has a half-life of 4.00 days. Given its mass 3.168 gram at a certain time, what was the sample's mass (in gram) before 0.7 month? 1 month is about 30.5 days.
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