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Answer to Question #15415 in Physical Chemistry for Megan
Question #15415
How long will it take a 16 g sample of bismuth-210 to decay such that 2.0 g of the element remains?
Expert's answer
Half life of bismuth-210 is 5 days.
m=m(0)*exp(-b*t)
m/m(0) = 2 g
/ 16 g = 1/8
1/8 = (1/2)^3 = 0.125
=> 3 half life periods
5
days x 3 = 15 days
m=m(0)*exp(-b*t)
m/m(0) = 2 g
/ 16 g = 1/8
1/8 = (1/2)^3 = 0.125
=> 3 half life periods
5
days x 3 = 15 days
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