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A 5.2 molal aqueous solution of methyl a...

A 5.2 molal aqueous solution of methyl alcohol is supplied. What is the mole fraction of methyl alcohol in the solution-

A

0.19

B

0.086

C

0.05

D

0.1

Text Solution

Verified by Experts

The correct Answer is:
B
No, of moles of `CH_(3)OH=n_(CH_(3)OH)=5.2` mol
No of moles of `H_(2)O=n_(H_(2)O)=(1000)/(18)=55.55` mol
`therefore`Mole fraction of methyl alcohol in the solution `=x_(CH_(3)OH)=(5.2)/(5.2+55.55)=0.086`
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