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Chemistry, 23.09.2019 09:10 haleyblu6351
A60.0-g sample of fermium-253 was placed in a sealed vessel 9.0 days ago. only 7.5 g of this isotope is now left. what is the half-life of fermium-253? 3.0 days 4.5 days 17.5 days 20.0 days
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A60.0-g sample of fermium-253 was placed in a sealed vessel 9.0 days ago. only 7.5 g of this isotope...
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