what is the overall polarity of this molecule? polar nonpolar

Brief Explanations:

• The molecule shown is formaldehyde ($HCHO$).
• In $HCHO$, the oxygen atom is more electronegative than carbon and hydrogen.
• The oxygen - carbon double bond ($C = O$) and the carbon - hydrogen single bonds ($C - H$) create a distribution of electron density.
• The molecule has a trigonal planar geometry around the carbon atom.
• Due to the difference in electronegativity (oxygen is more electronegative than carbon and hydrogen), there is a net dipole moment.

Answer:

polar