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Estoria29
Estoria29 Estoria29
  • 02-02-2017
  • Biology
Answered

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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MimzyTheDragon
MimzyTheDragon MimzyTheDragon
  • 02-02-2017

160 grams i believe. have a good day

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