Water’s molar mass is 18.01 g/mol. The molar mass of glycerol is 92.09 g/mol. At 25°C, glycerol is more viscous than water. Which substance has the stronger intermolecular attraction?

Glycerol has the stronger intermolecular attraction. Its greater viscosity means its molecules resist flowing past one another more strongly, which is associated with stronger attractions between molecules. Glycerol also has the larger molar mass, so choice B gives the correct substance and supporting evidence.

AI-written and checked against the verified answer.