$[-/1\mathrm{.}66$ Points$]$

Which of the covalent bonds below are nonpolar? $($Choose all that apply$)$:

$H-H,N-H,C-C,C-H,H-O$

$O-O,N=N,C-O,C=O,$

Note: In the question above, assume that a covalent bond will be called "polar" if the ele difference is less than $0\mathrm{.}5.$ An electronegativity difference of $0\mathrm{.}5$ will be considered neithe

This assumes the following electronegativity values: hydrogen $=2\mathrm{.}1,$ carbon $=2\mathrm{.}5,$ nitroge

Why do we care? A polar bond sets up the molecule with partial charges, that can then cling