Chemistry, 09.10.2019 04:00 Lizae9099

What is the half-life of an isotope if 125 g of a 500 g sample of the isotope remains after 3.0 years?
a.) 3.5 years
b.) 4.5 years
c.) 1.5 years
d.) 2.5 years

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What is the half-life of an isotope if 125 g of a 500 g sample of the isotope remains after 3.0 year...