In which of the compounds
I) NH3
II) HF
III) CH4
would you expect to exhibit significant hydrogen bonding?

Option II, HF.

There's a good mnemonic to help you remember what bonds are considered Hydrogen bonding:

"H just wants to have FON"

Essentially, this means that H only has Hydrogen bonding with Fluorine, Oxygen, and Nitrogen.

-T.B.

This is not a full question, text me and i'll you