posted by LALA .
How does the molar mass of molecules affect the boiling points?
e.g MOlar masses
can it be said that except for HF molecule, as molar mass increases the boling points alos increases
I think the boiling point you have for HCl is out. See, for example, http://www.transtutors.com/chemistry-homework-help/S-and-P-block-elements/hydrides-of-halogens.aspx
However, your conclusion is correct that boiling point increases, generally, as molar mass increases. HF is the one out of line because of H bonding.