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The half-life of cobalt-60 is 5.20 yr. how many milligrams of a 2.000-mg sample remains after 6.55 y...
4 months ago
Q:
The half-life of cobalt-60 is 5.20 yr. how many milligrams of a 2.000-mg sample remains after 6.55 years?
Accepted Solution
A:
Decay expression is stated as follows:
N(t) = N(o)e^(-0.693t/t1/2)
N(t) = Quantity remaining after time, t; N(o) = Initial quantity, t = time, t1/2 = Half life
Therefore,
N(6.55) = 2*e^(-0.693*6.55/5.2) = 0.835 g