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Chemistry
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OpenStudy (royalkiwi):
An 80.0 g sample of iodine-131 was placed in a sealed vessel forty days ago. Only 2.5 g of this isotope is now left. What is its half-life?
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OpenStudy (anonymous):
can you provide the formula for this question?
Vocaloid (vocaloid):
Amount left = original amount * (1/2)^number of half lives Length of half life = total time/number of half lives
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