Final answer:
The boiling points of hydrides of elements in groups 5, 6, and 7 generally increase with increasing molecular mass. Hydrogen bonding also impacts the boiling points of these hydrides, causing them to be higher than expected for compounds with similar molecular mass.
Step-by-step explanation:
In general, the boiling points of hydrides of elements in groups 5, 6, and 7 increase with increasing molecular mass.
For example, the boiling points of the hydrides in these groups (NH3, H2O, HF, PH3, H2S, HCl, etc.) generally increase as you move down the group and across the periodic table.
Additionally, hydrogen bonding has a pronounced effect on the boiling points of these hydrides, causing the boiling points to be higher than expected for compounds with similar molecular mass.