The mole fraction of propylene glycol is 0.22.
What is mole fraction?
This is the ratio of the number of moles of a substance to the total number of moles present.
The total mass of solute and solvent = 100 g
Mass of solute = 54.8 g
Mass of solvent = 100 g - 54.8 g = 45.2 g
Number of moles of water = 45.2 g/18 g/mol = 2.5 moles
Number of moles of solute = 54.8 g/76 g/mol = 0.72 moles
Mole fraction of propylene glycol = 0.72 moles/0.72 moles + 2.5 moles
= 0.22.
Learn more about mole fraction: https://brainly.com/question/2060778
