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14. A sample that originally contained 2.5 g of rubidium-87 now contains 1.25 g. The half-life of rubidium-87 is 6 x 10^10 years. How old is the sample? Is this possible? Why or why not?
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14. A sample that originally contained 2.5 g of rubidium-87 now contains 1.25 g. The half-life of ru...
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