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Hydrogen chrolide gas is sent into a 100...

Hydrogen chrolide gas is sent into a 100 metre tube from one end 'A and ammonia gas from the other end 'B', under similar conditions. At what distant from 'A' will be the two gases meet.

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Let distance travelled by , HCI=x
Then the distance travelled by , `NH_3=100-x`
According to Graham's law
`x/(100-x)=sqrt(M_(NH_3)/M_(HCl))`
`x/(100-x)=sqrt(17/36.5)`
`therefore x=40.48`
The two gases will meet at 40.48 metres from the end A.
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