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?

15 years ago

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.

15 years ago

Answered by Kipper

thank you drwls for the help

15 years ago

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