Question

An aqueous solution of alcohol contains $18g$ of water and $414g$ of ethyl alcohol. The mole fraction of water is

• A. $0.7$
• B. $0.9$
• C. $0.1$
• D. $0.4$

Answer 1

Answer: (C)

$n_{C_2{H}_{5}OH}=\frac{414}{46}=9$
$n_{H_{2}O}=\frac{18}{18}=1$
$X_{H_{2}O}=\frac{1}{10}=0.1$