Final answer:
The relationship between the compounds can be determined by their molar mass and polarity.
Step-by-step explanation:
The relationship between the compounds can be determined by looking at their molar mass and polarity. The three compounds have similar molar mass, which indicates that they have similar sizes and numbers of atoms. However, the differences in polarity affect the strength of the intermolecular dipole-dipole interactions and the boiling points of the compounds.