Question

What is the answer to this question​

Answer 1

Answer:

0.075.

Explanation:

Molality =no of moles of solute/mass of solvent (in kg) . here Molality =4.5 So, it means 4.5 moles of solute present in 1kg solvent. So Mole fraction of solute=4.5/4.5+ 55.5=4.5/60=3/40=""0.075.