kingdesto9789 kingdesto9789

02-08-2022
Chemistry

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How many half-lives have passed in a sample that originally contained 5000 parent isotopes but now has only 625?

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jsimpson11000 jsimpson11000

02-08-2022

Answer:

3 half lives

Explanation:

5000 * (1/2)^n = 625 where n = number of half lives

log ( 625/5000) / log(1/2) = n = 3

5000 2500 1250 625

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