Asked by Jazmin
K-42 has a half-life of 12.4 hours. If you begin with 250g of
K-42, determine how much you will have left after 4 half-lives.
How long does 4 half-lives take?
please help
K-42, determine how much you will have left after 4 half-lives.
How long does 4 half-lives take?
please help
Answers
Answered by
DrBob222
There is a shorter way, I think, but this is what I would do.
k = 0.693/t<sub>1/2</sub>
Substitute k into the equation below.
ln(No/N) = kt
No = 250
N = unknown
k from above.
t = time = 4*12.4 = ??
The short way is (n = number of half lives)
1/2^n = fraction left
1/2^4 = ?? and ?? x 250 = xx.
You should get the same answer either way.
k = 0.693/t<sub>1/2</sub>
Substitute k into the equation below.
ln(No/N) = kt
No = 250
N = unknown
k from above.
t = time = 4*12.4 = ??
The short way is (n = number of half lives)
1/2^n = fraction left
1/2^4 = ?? and ?? x 250 = xx.
You should get the same answer either way.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.