Question

the dipole moment of CO2 is zero. why?

Answer 1

as the structure of co2 is this hence net diople is 0

Answer 2

This is because the charge is equally distributed amongst the entire molecule. When molecules have an even charge distribution and no dipole moment, then they are nonpolar molecules. CO2 is a linear molecule, so our dipoles are symmetrical; the dipoles are equal in magnitude but point in opposite directions.