Question

The mole fraction of solute in $1$ molal aqueous solution is:

• A. $0.018$
• B. $1.20$
• C. $0.05$
• D. $0.98$

Answer 1

The correct option is A $0.018$

For 1 molal aqueous solution,
Moles of solute $=1$
Moles of solvent $=\frac{1000}{18}=55.56$
Mole fraction of solute $=\frac{1}{56.56}=0.0176$