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OpenStudy (anonymous):
A certain radioactive element has a half-life of one hour. If you start with 40.0 grams of the element at noon, how much of the radioactive element will be left at 2 p.m.?
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OpenStudy (anonymous):
I GOT 10.0 GRAMS
OpenStudy (cwrw238):
after one hour the amount reduces to 20 g - so after one more hour...
OpenStudy (cwrw238):
yeah
OpenStudy (anonymous):
thanks
OpenStudy (fellowroot):
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