Chemistry, 26.10.2020 01:00 bionicboy03120440

A radioactive isotope has a half life of 55.0 seconds. After 275 seconds a sample of the isotope has a mass of 0.250 grams What was the initial mass of the sample?

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A radioactive isotope has a half life of 55.0 seconds. After 275 seconds a sample of the isotope has...

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