Asked by tarsa

If 9.00 g of _27^60 Co (half-life = 5.30 y) are allowed to decay, how many grams would be left after 1.00 y and after 10.0 y?

g after 1.00 y
g after 10.0 y
Answered by DrBob222
k = 0.693/t<sub>1/2</sub>
Then ln(No/N) = kt
No is 9.00
N = ?
k from above
t = 1 y or 10 y (two separate problems.)
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