chris1219 chris1219
  • 10-12-2018
  • Chemistry
contestada

what is the half life isotope if after 21 days you have 31.25 g remaining from a 250.0 g starting sample size?

Respuesta :

supersiren25 supersiren25
  • 10-12-2018

250 --> 125 --> 62.5 --> 31.25


each arrow equals one half life, so 3 half lives


14 days/ 3 half lives =


4.67 days = half life

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