Asked by Anonymous

the half life of oxygen-15 is 124 s. if a sample of oxygen-15 has an activity of 4000 Bq, how many minutes will elapse before it reaches an activity of 500Bq

13 years ago

Answered by Steve

since 500 = 4000/8, that would be 3 half-lives.

13 years ago

Answered by rr

6 minutes and 12 seconds!

10 years ago

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