L Calculate the potential energy of the dipole-dipole interaction between 2 HF molecules oriented along the X axis in an XY coordinate plane whose area of positive charge is separated by 5.00 A from the area of negative charge of the adjacent molecule. The dipole moment of the HF molecules 1s p = 1.92 D (1 Debye = 3.336-10" C-m). Assume the molecules exist in vacuum with y = 8.8541878-1071 CN'm