For a first order reaction the rate R = −k N so the ratio of rates at two different times is given by R(t1)/R(t2) = N(t1)/N(t2).
For nuclear decay the rate is ofen is expressed in units of counts per unit of time.
A chemists determines that a sample of petrified wood is 2.50 X 103 years old.
What is the rate of decay, in counts per minute per gram, of carbon-14 in the sample?
The decay rate of carbon-14 in wood today is 13.6 counts per minute per gram, and the half life of carbon-14 is 5730 years.
Enter a numeric answer only do not include units
2007-04-27
09:00:07
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2 answers
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asked by
Foxychick
1
in
Chemistry