Which of the following molecules are polar? Select all that apply.Group of answer choicesCH2OCH2Cl2CO2SO3

To determine if a molecule is polar, we need to look at the electronegativity of the atoms and the shape of the molecule.

1. CH2O: This molecule is polar. The oxygen atom is more electronegative than the carbon and hydrogen atoms, creating a dipole moment. The molecule is also not symmetrical, which means the dipoles do not cancel out.

2. CH2Cl2: This molecule is also polar. The chlorine atoms are more electronegative than the carbon and hydrogen atoms, creating a dipole moment. The molecule is tetrahedral, which is a polar geometry.

3. CO2: This molecule is nonpolar. While the oxygen atoms are more electronegative than the carbon atom, the molecule is linear. This means the dipoles cancel out, making the molecule nonpolar.

4. SO3: This molecule is nonpolar. The molecule is trigonal planar and symmetrical, which means the dipoles cancel out.

So, the polar molecules are CH2O and CH2Cl2.