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The total pressure of a mixture of oxyge...

The total pressure of a mixture of oxygen and hydrogen is 1.0 atm. The mixture is ignited and the water is removed. The remaining gas is pure hydrogen and exerts a pressure of 0.40 atm when measured at the same values of T and V as the original mixture. What was the composition of the original mixture in mole fraction ?

A

`x_(o_(2))=0.2,x_(H_(2))=0.8`

B

`x_(o_(2))=0.4,x_(H_(2))=0.6`

C

`x_(o_(2))=0.6,x_(H_(2))=0.4`

D

`x_(o_(2))=0.8,x_(H_(2))=0.2`

Text Solution

Verified by Experts

The correct Answer is:
a
(a) `pxxn`
`underset(a-2b)underset(a)(2H_(2)(g))+underset(b-b)underset(b)(O_(2)(g))to2H_(2)O(g)`
`a+b=1`
`a-2b=0.4`
`3b=0.6`
`b=0.2`
`a=0.8`
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