Three liquids have the following properties:
Liquid X: molar mass 30gmol−1; dipole moment 3.9D
Liquid Y: molar mass 58gmol−1; dipole moment 0.0D
Liquid Z: molar mass 32gmol−1; dipole moment 1.7D
Arrange the liquids in order of increasing expected normal boiling point. Provide your answer as a sequence (lowest < … < highest).