Question

$5.2$ moles of aqueous solution of 1 L of methyl alcohol, $C{H}_{3}OH$ is supplied. What is the mole fraction of methyl alcohol in the solution?

• A. $0.100$
• B. $0.190$
• C. $0.086$
• D. $0.050$

Answer 1

The correct option is C $0.086$

$5.2$ moles of $C{H}_{3}OH$ is present in $1000$ g of water.

Moles of $H_{2}O=\frac{1000}{18}$

Mole fraction of $C{H}_{3}OH$ $=\frac{5.2}{5.2+\frac{1000}{18}}=0.086$

So, the correct option is $C$