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Chemistry, 21.12.2020 19:20 shardonnay2160

How much time must elapse before 16 grams of potassium-42 decays, leaving 2 grams of the original isotope? *

I really don’t get it please answer quick

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How much time must elapse before 16 grams of potassium-42 decays, leaving 2 grams of the original i...
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