Final answer:
To calculate the percent ionic character of a molecule, divide the measured dipole moment by the limiting dipole moment and multiply by 100%. For the given molecule with a dipole moment of 1.39 D and bond length of 121 pm, the percent ionic character is approximately 22.8%.
Step-by-step explanation:
To calculate the percent ionic character of a molecule, we can use the formula:
% Ionic character = (Measured dipole moment / Limiting dipole moment) x 100%
The limiting dipole moment can be calculated by assuming the molecule is completely ionic. For a bond length of 121 pm, the calculated limiting dipole moment is approximately 6.09 D.
Using the given measured dipole moment of 1.39 D, the percent ionic character can be calculated as:
% Ionic character = (1.39 D / 6.09 D) x 100% = 22.8%