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After three half-lives, a sample contains 20 grams of parent isotopes. How many grams of the parent isotope were present to start?

After three half-lives, a sample contains 20 grams of parent isotopes. How many grams of the parent isotope were present to start?
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After three half-lives, a sample contains 20 grams of parent isotopes. How many grams of the parent isotope were present to start?

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User Dorcas
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1 Answer

4 votes
160 grams i believe. have a good day
answered
User EvanBlack
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8.0k points
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