Question

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

• A. 0.0177
• B. 1.8
• C. 0.05
• D. 0.98

Answer 1

Answer: (A)

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