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If half-life of a substance is 5 years,...

If half-life of a substance is 5 years, then the total amount of substance left after 15 years when initial amount is 64 g is

A

16 g

B

2 g

C

32 g

D

8 g

Text Solution

Verified by Experts

The correct Answer is:
D
`N =N_(0) ((1)/(2))^(n)` for `n =3, N = (N_(0))/(8) = (64)/(8) = 8` g
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