ind7qWhabriasjay ind7qWhabriasjay 30-09-2016 Chemistry contestada given a 800 mg sample of thorium-231 decomposes via beta emission with a half life of 25.5 hours, how long would it take, in days, for the sample to decay down to 25 mg? 231 0 231 th -> beta pa 90 -1 91 800 mg/ 25 mg
