SOLUTION: How long will it take for 100 grams of a substance with a half-life of 2 years to decay to a mass of 50 grams?

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Question 711137: How long will it take for 100 grams of a substance with a half-life of 2 years to decay to a mass of 50 grams?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How long will it take for 100 grams of a substance with a half-life of 2 years to decay to a mass of 50 grams?
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It's half as much, so it'll take 2 years.