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Chemistry, 16.06.2020 21:57 mNtYiOl7139

What is the total mass of Kr-42 remaining in a 20-mg sample after 48.8 hours? (1) 2.5 mg
(2) 5.0 mg
(3) 10 mg
4) 20 mg

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What is the total mass of Kr-42 remaining in a 20-mg sample after 48.8 hours? (1) 2.5 mg
(2) 5...
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