HBr (Hydrogen Bromide) is a polar molecule.
Explanation: HBr is composed of hydrogen (H) and bromine (Br). The electronegativity difference between hydrogen and bromine is significant, with bromine being more electronegative. This difference causes the shared electrons in the H-Br bond to be more attracted to the bromine atom, creating a dipole moment. As a result, HBr has a partial positive charge on the hydrogen atom and a partial negative charge on the bromine atom, making it a polar molecule.