Question

The mole fraction of water in 20% aqueous solution of $H_2{O}_2$ is

• A. $\frac{20}{80}$
• B. $\frac{80}{20}$
• C. $\frac{68}{77}$
• D. $\frac{77}{68}$

Answer 1

Answer: (C)

Mole fraction of water $=\frac{\frac{80}{18}}{\frac{80}{18}+\frac{20}{34}}=\frac{68}{77}$