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Asked Jan 11, 2020
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 The half-life for the radioactive decay of C-14 is 5730 years and is independent of initial concentration. How long will it take for 25% of the C-14 atoms in a sample of C-14 to decay? If a sample of C-14 initially contains 1.5 mmol of C-14, how many millimoles will be left after 2255 years? 

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