2. Estimate the order of the boiling points for the four molecular species in question 1. Explain your reasoning.

XeO₃: polar, so some dipole-dipole interactions; large volume so strong van der Waal's interactions.
XeOF₂: weakly polar, so weak dipole-dipole interactions; large volume so strong van der Waal's interactions.
KrF₂: nonpolar, small volume so weak van der Waal's interactions.
SeF₄: polar, so some dipole-dipole interactions; moderately small volume so weak to moderate van der Waal's interactions.
prediction for boiling points: KrF₂ < SeF₄ < XeOF₂ < XeO₃