Which of these molecules contain polar bonds, and which contain nonpolar bonds?

Question

Water, Ozone, Carbon Dioxide, and Oxygen

Answer 1

for this you will need to use an electronegativity chart to look up the values of each atom involved to determine bond types.

given the following EN values:

H= 2.1

O= 3.5

C = 2.5

rules to know

C-H is considered non-polar

polarity is based on EN difference

0.0 to 0.2 is considered non-polar covalent

0.3 to 1.4 is considered polar covalent

>1.5 is considered ionic

if you use those values and rules, then you'll get

oxygen and ozone contain non-polar bonds

water and CO₂ contain polar bonds

*keep in mind that this does not indicate whether or not the molecule is polar or not since that has to do with the molecule's VESPER shape. ie. CO₂ is a non-polar molecule, Ozone is a polar molecule