The half-life period of a first order reaction is 15 minutes. What is the amount of substance left after one hour?
Answer & explanation
Correct answer: option 2
Since : t1/2 = 15 min.
No. of half lives = \(\frac{60}{15}\) = 4
Amount of substance left after one hour = \(\frac{A_0}{2^n}\) = \(\frac{A_0}{2^4}\) = \(\frac{A_0}{16}\)