A first-order reaction shows successive half-lives of 80 s on a [A] vs t plot.
For a first-order reaction, the half-life t1/2 = 80 s. After 240 s, what fraction of A remains?
- A
1/3
- Bcheck_circle
1/8
- C
1/16
- D
1/4
Explanation
240 s = 3 half-lives. (1/2)^3 = 1/8 remains.