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Answer to Question #134927 in Physical Chemistry for harinath
Question #134927
A radioactive element has found to have half life of 20 seconds. how long will it take for it disintegrate 80%.
Expert's answer
t1/2=20 seconds
Initial =N0
Final amount left =0.2N0
ln(N0/0.2N0)= (0.693 x t)/20
t=46.44 seconds (Ans.)
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