Asked by Matthew

What is the half-life of a 100.0 g sample of nitrogen-16 that decays to 12.5 g of nitrogen-16 in 21.6 s? Please help me!!
Answered by DrBob222
ln(No/N) = kt
No = 100g
N = 12.5g
k = solve for this
t = 21.6 sec

Then Substitute k into
k = 0.693/t<sub>1/2</sub> and solve for t<sub>1/2</sub>
Answered by Bashir
Yes
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