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OpenStudy (anonymous):
**PLEASE HELP!!** A radioactive isotope has a half life of 4 days. The amount remaining undecayed from 1 kg of the isotope after 20 days is..?
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OpenStudy (anonymous):
P.S. Answer is 31 grams... I'm just confused on how to get that
OpenStudy (anonymous):
(1)(.5)^20/4
OpenStudy (anonymous):
That'll give you .03125 kg. Then just make it into grams. 31.25.
OpenStudy (anonymous):
Hope that helps.
OpenStudy (anonymous):
final=initial(.5)^time/half life time
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OpenStudy (anonymous):
^for future reference
OpenStudy (anonymous):
Yay, thank you :) @JoyLin
OpenStudy (anonymous):
No problem! Anytime! Feel free to message me if any questions are left unanswered here. I'll do my best to help.
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