The dipole moment of a molecule is calculated using the formula:Dipole moment = Charge Q Bond length d For hydrogen fluoride HF , the bond length d is approximately 0.92 9.2 10^-11 m and the charge difference Q between hydrogen and fluorine is approximately 0.42 e elementary charge , where 1 e is equal to 1.602 10^-19 C Coulombs .Now, we can calculate the dipole moment: = Q d = 0.42 e 9.2 10^-11 m To convert the elementary charge to Coulombs: = 0.42 1.602 10^-19 C 9.2 10^-11 m 6.73 10^-30 CmSo, the dipole moment of hydrogen fluoride HF molecule is approximately 6.73 10^-30 Cm.