How to tell polar or non polar from lewis structure?

[Junwei Sun 4I]

Could someone please clarify how we can tell if a molecule is polar or non-polar from looking at its lewis structure? What are some factors in a lewis structure that will make a molecule polar?

[chemboi]

Presence of asymmetric lone pairs, and asymmetric distribution of atoms with electronegativity differences are indicators of polarity

[Zoya Mulji 1K]

If you have the lewis structure, you can draw your dipole arrows considering electronegativity and if the arrows don't balance out then the molecule will be polar.

[Alan Wu]

If the dipole moments in a lewis structure cancel out, then the molecule will be nonpolar.
If there are lone pairs of e-, the molecule is almost always polar.
If the dipole moments don't cancel out and point in one general direction, then the molecule is polar.

[Aayush Patel 3B]

If a hydrogen bond is present anywhere throughout the molecule and the dipoles do not cancel due to symmetry, than that respective molecule will be polar.

[Debora Fernandez Clemente_ 4H]

Are going to have to determine on whether a molecule is polar or not?

[Destiny_Ryales_3J]

Is this supposed to be on next week’s test?

[AGulati_4A]

A polar structure has non-cancelling electronegativity vectors while a non-polar structure has cancelling ones.

[Kaitlyn Jang 1F]

Check to see if the dipoles cancel out in molecules. It helps to draw out arrows to signify the dipoles of each atom to visually see if they cancel out or not to create a polar or nonpolar molecule.

[Rebekah Alfred 1J]

Is this supposed to be on next week’s test?

My TA said that we should know about polar and non-polar molecules for Test 2.