anonymous
  • anonymous
Technetium-99 is used for brain scans. The isotope has a half-life of 6 hours. A laboratory needs 200 g for an experiment. If shipments takes 72 hours, how much Technetium-99 should be prepared so that the appropriate amount remains after shipping?
Chemistry
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anonymous
  • anonymous
Technetium-99 is used for brain scans. The isotope has a half-life of 6 hours. A laboratory needs 200 g for an experiment. If shipments takes 72 hours, how much Technetium-99 should be prepared so that the appropriate amount remains after shipping?
Chemistry
katieb
  • katieb
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anonymous
  • anonymous
Do you know the functions e and ln?
anonymous
  • anonymous
no
anonymous
  • anonymous
I think you start out by 72/6= 12 half-lives

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anonymous
  • anonymous
Not even close. Do you have a e and ln in your scientific calculator.

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