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OpenStudy (anonymous):
a substance has a galf life of 10,000 years and an initial mass of 1,000 grams. how many years will pass before only 250 grams of the substance's parent material is left
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OpenStudy (anonymous):
30,000 years In 10,000 years it will have a mass of 1,000 grams. In 20,000 years 500 grams. In 30,000 years 250 grams
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