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Answer to Question #145514 in Inorganic Chemistry for Jade
Question #145514
Thorium-234 has a half-life of 24.1 days. If a sample of thorium 234 has a mass of 6.4 x 10 -12 g, how
much of the sample is left after 72.3 days
much of the sample is left after 72.3 days
Expert's answer
No=6.4x10^-12
T1/2=24.1
T=72.3
N=?
N=No(1/2)^t/t1/2= 6.4x10^-12 x (1/2)^ 72.3/24.1 = 8x10^-13.
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