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Iron-59 has a half-life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of a new sample of iron? Please...Asked by Dani
Iron-59 has a half-life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of a new iron sample? Please show the calculating so I can learn to do it.
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Answered by
DrBob222
k = 0.693/t<sub>1/2</sub>
Solve for k and substitute into the below.
ln(No/N) = kt
No = 100
N = 25
k from above
Solve for t in days.
Solve for k and substitute into the below.
ln(No/N) = kt
No = 100
N = 25
k from above
Solve for t in days.
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