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A piece of granite is determined to contain 50 grams of U-238. After on half-life, how much material
is left? After 2 half-lives? After 2 half-lives? After 3 half-lives? After 4 half-lives?
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Answer: Hydrogen-3 or tritium as it is commonly called, has a half life of 12.32 years. If you start with 20 grams of it, how much will remain after 25 years? Ending Amount = Beginning Amount / 2 (time / half-life) Ending Amount = 20 / 2 (25 / 12.32) Ending Amount = 20 / 2 (2.0292) Ending Amount = 20 / 4.0818. Ending Amount = 4.8997 grams

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Answer:

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