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Chemistry, 06.11.2020 17:10 Livi9666

After 30 minutes, 30 grams of a sample of Radon-222 remains unchanged. If the original sample had a mass of 960 grams, what is the half-life of the Radon-222? A.
8 minutes

B.
6 minutes

C.
3 minutes

D.
15 minutes

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