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Chemistry

Answered

A radioactive sample has an activity of 450 cpm three half lives after the initial activity was determined. What was the original activity?

Answer :

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Answer:

original activity is 3600 cpm

Explanation:

3 half-lives = 450 cpm

2 half-lives = 900 cpm

1 half-life = 1800 cpm

answer = 3600 cpm

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