The half-life of l-137 is 8.07 days. If 25 grams are left after 40.35 days, how many grams were in the original sample?

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Chapter31: Radioactivity And Nuclear Physics
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Problem 12PE: If a 1.50cmthick piece of lead can absorb 90.0% of the rays from a radioactive source, how many...
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3. The half-life of l-137 is 8.07 days. If 25 grams are left after 40.35 days, how many grams were in
the original sample?
Transcribed Image Text:3. The half-life of l-137 is 8.07 days. If 25 grams are left after 40.35 days, how many grams were in the original sample?
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