Chapter 9 - Sections 9.1-9.11 - Exercises - Problems by Topic - Page 420: 57

The Lewis structure is shown in the attached image. The dipole moment is shown with an arrow. The ionic character of $CO$ bond is around 25%.

Electronegativity of $C$ is 2.5 and of $O$ is 3.5. So, the electronegativity difference is 1. From Figure 9.10, we can see that this corresponds to a nearly 25% ionic character for the bond. The Lewis structure is shown in the attached image. The dipole moment is shown with an arrow. The ionic character of $CO$ bond is around 25%.