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Q: How much Cu-61 half-life about 3 hours would remain from a 2 mg sample after 9 hours?
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Molybdenum-99 has half a half-life of 66 hours. after 132 hours how much of an initial sample of 10 ci of mo-99 would remain?

After 132 hours, 1/4 of the initial sample of 10 Ci of Mo-99 would remain. Since the half-life is 66 hours, after 66 hours half of the sample would remain (5 Ci), and after another 66 hours (totaling 132 hours), half of that remaining amount would be left.


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How much Cu-61 (half-life about 3 hours) would remain from a 2 mg sample after 9 hours?

.25 mg


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How much Cu-61 half-life about 3 hours would remain from a 2mg sample after 9 hours?

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