are Carbon tetrachloride, HCN, CO2, CCl2F2, and Water all polar?

Question

each one can be singled out and written if not or is polar

Answer 1

CCl_{4 - Nonpolar because the tetrahedral has the same amount of pull from all for molecules. All the Chloride molecules pull electrons evenly.}

_{HCN - Polar because the CN is more electronegative than H. Meaning it would pull more electrons.}

_{CO2 - NonPolar because the structure is O---C---O, you can see that the O's are both pulling electrons from the C, meaning there is no charge.}

_{H2O- Polar because the electrons aren't being shared equally. The O is hogging all of the electrons because it is more electronegative.}

_{Hope this helped.}