1.

The half life of radioactive sodium is 15 hours. How many hours would it take for 64 g of sodium to decay to one-eight of its original value?

Answer»

3 HOURS
15 hours
30 hours
45 hours

SOLUTION :d) `t=2.303/k log (No)/(NT)`
`t=(2.303 xx(15 "hours"))/(0.693)log64/8`
`=(2.303 xx 15 xx 0.9030)/(0.693) = 45` hours


Discussion

No Comment Found

Related InterviewSolutions