Estoria29 Estoria29

02-02-2017
Biology

contestada

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

Respuesta :

MimzyTheDragon MimzyTheDragon

02-02-2017

160 grams i believe. have a good day

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what + 145 + 318 = 624