(a) From the data in Table 8.3, calculate the effective charges on the H and Br atoms of the HBr molecule in units of the electronic charge, e.
(b) Compare your answers to part (a) with those in Sample Exercise 8.5 for the HCl molecule. Can you explain why the values are different?

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TABLE 8.3。Bond Lengths, Electronegativity Differences, and Dipole Moments of the Hydrogen Halides Electronegativity Difference Compound Bond Length (Å) Dipole Moment (D) HF HCI HBr HI 0.92 1.27 1.41 1.61 0.9 0.7 0.4 1.82 1.08 0.82 0.44