Physics, 16.10.2019 16:00, Ajaxr3175

How much time is required before a 2.50-mg sample of 146 61 pm (t1/2 = 2020days) is reduced to 1.25mg

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How much time is required before a 2.50-mg sample of 146 61 pm (t1/2 = 2020days) is reduced to 1.25m...