To determine the polarity of the H-Cl bond in a hydrogen chloride molecule, we need to look at the difference in electronegativity values between hydrogen and chlorine.Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. The greater the difference in electronegativity values between two atoms, the more polar the bond will be.Given the electronegativity values:Hydrogen H = 2.2Chlorine Cl = 3.0Difference in electronegativity = |3.0 - 2.2| = 0.8A bond is generally considered polar if the electronegativity difference is greater than 0.5. Since the electronegativity difference between hydrogen and chlorine is 0.8, the H-Cl bond in a hydrogen chloride molecule is polar.