Chemistry Question on Mole concept and Molar Masses

Question

The mole fraction of solute in 1 molal aqueous/solution is

Answer 1

Solution

Mole fraction $=\frac{1}{1+55.5}=0.0177$ $1$ molal solution contains 1 mole of solute in $55.5$ moles of water $(1000 \,g$ of water contains $55.5$ moles of it)