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Carbon-14 has a half life of 5730. If a sample contained 70 mg originally, how much is left after 17190 years

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Answer:After another 5730 years ( three half lives or 17190 years) 17.5 /2 = 8.75mg decays and 8.75g remains left. after three half lives or 17190 years, 8.75 g of C-14 will be left.

Explanation:

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