Practice question

Given: Calculate the mole fraction of water in a solution containing 92 g of glycerol ( C₃H₈O₃ ) and 108 g of water. (Molar mass: C₃H₈O₃ = 92 g/mol, H₂O = 18 g/mol ) These values define the system as per NCERT data. Formula: Moles of glycerol = 92/92 = 1 mol. This is standard NCERT relation. Substitution & Calculation: Moles of water = 108/18 = 6 mol . Total moles = 1 + 6 = 7. Mole fraction of water = 6/7 = 0.857 . Result: The computed value matches expected outcome and confirms correct choice as per NCERT.