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Nuclear and Solid State Chemistry
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Carbon-14 (half-life of 5760 years) is used to determine the age of fossils. A sample contains 200 mg of C-14. How long will it take to reduce C-14 in the sample to 25 mg?
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A
17280 years
💡 Explanation:
For 17280 years, the number of half-life (n) = 3
Cn = (1/2)n= (1/2)3 = 1/8
1/8 of 200 mg = 25 mg
So, after 17280 years, the amount of C-14 in the sample will be reduced to 25 mg.