A sample of ore containing radioactive strontium 90 38Sr
Chapter , Problem 60(choose chapter or problem)
A sample of ore containing radioactive strontium 90 38Sr has an activity of 6.0 3 105 Bq. The atomic mass of strontium is 89.908 u, and its half-life is 29.1 yr. How many grams of strontium are in the sample?
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