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A mixture is to eb anlysed for penicllin...

A mixture is to eb anlysed for penicllin. You add `10.0 mg` fo penicllin labelled with `.^(14)C` that has a specific activity of `0.785mu Ci mg^(-1)`. From this mixture you are able to isotlate only `0.42 mg` of pure penicllin. The specific activity of the isolated pen,om od `0.102mu Ci mg^(-1)`. How much penicllin was in the original mixture?

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The correct Answer is:
`66.96 mg`
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P BAHADUR-RADIO ACTIVITY-Exercies 9
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  13. The rate of decay of a radioactive sample is R(1) at time t(1) and R(2...

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  14. 1g atom of Ra^(226) is placed in an evacuated tube of volume 5 liter. ...

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  18. The half-life of .^(32)P si 14.3 day. Calculate the specific activity ...

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