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Asked by
Kipper
Radon-22 has a half life of 4 days. If you begin with 32 grams of radon, how many grams will be left after 20 days?
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Answered by
drwls
20 days is 5 half-lives.
Divide 32 by two, five times.
That is the same as dividing 32 by 2^5.
Answered by
Kipper
thank you drwls for the help
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