Chemistry
Given a 800 mg sample of Thorium231 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
asked by
Lauren

25/800 = 1/32 = 1/2^5
so, it will take 5 halflivesposted by Steve
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