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The half life of a radio active substanc...

The half life of a radio active substance is `6` hours. The amount of the substance undergone disintegration when `36 gms` of it undergoes decay for `18` hours is

A

`31.5 gm`

B

`4.5 gm`

C

`18 gm`

D

`9 gm`

Text Solution

Verified by Experts

The correct Answer is:
A
`W=(W_(0))/(2^(n)), n=3`
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