3emmanelson 3emmanelson

03-05-2018
Chemistry

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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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diazpat004 diazpat004

03-05-2018

1.25, you divide 2.5 by 80, then times by 40

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Emilani730 Emilani730

17-12-2018

the answer on edg is 8 days

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