- #1
jzwiep
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Homework Statement
You want to do an experiment using 47Ca (half-life=4.53 days). You will need 3.25 μg of the nuclide. What mass of CaCO3 (100% enriched in 47Ca) must you order if it will take 50 hours to be delivered to you from the nuclear facility where it is prepared?
Homework Equations
The Attempt at a Solution
4.53 days x 24 hrs/day = 108.72 hrs
50/108.72 = 0.4599 half-lives
(1/2)^0.4599 = 0.727
3.25 μg / 0.727 = 4.47 μg
Am I doing something wrong? All the ways I've seen to do this type of problem lead me to the same answer, but it says it's incorrect.