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OpenStudy (anonymous):
The half-life of rubidium-89 is 15 minutes. If the initial mass of the isotope is 250 grams, how many grams will be left after 100 minutes?
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OpenStudy (anonymous):
@triciaal
OpenStudy (anonymous):
In 15 minutes: 125 grams 30 minutes: 62.5 grams 45 minutes: 31.25 grams 60 minutes: 15.625 grams
OpenStudy (anonymous):
@perl
OpenStudy (anonymous):
@iambatman
OpenStudy (anonymous):
2.46 grams, 0.0098 grams, 0.90 grams, or 225.31 grams
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