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16-12-2017
Chemistry

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A particular radioactive isotope has a half-life of (2.50+a) hours. if you have (24.5+b) g of the isotope at 10:00 am, how much will you have at 7:30pm? give your answer in grams (g)and with 3 significant figures.

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bnnnnnuxhu bnnnnnuxhu

19-12-2017

its a not b and i dont know the reast

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