Question

The count rate from 100 cm3 volume of a radioactive liquid is c . Some of this liquid is now discarded. The count rate of the remaining liquid is found to be c/10 after three half-lives. If the volume of the discarded liquid is nx103, find the value of n
​

Answer 1

Answer:

Explanation:

Initial activity/volume =c100

Let V: volume of remaining liquid

Activity after three half-lives =c/10V

A=A0(12)n

c/10V=c100(12)3

V=c/10c/800=80cm3