As a language model AI, I cannot perform ab initio calculations directly. However, I can provide you with some information about the dipole moment of nitrogen molecule N2 and how ab initio calculations can be used to determine it.The nitrogen molecule N2 is a homonuclear diatomic molecule, meaning it consists of two identical atoms nitrogen bonded together. Due to the symmetry of the molecule and the equal sharing of electrons between the two nitrogen atoms, the dipole moment of N2 is essentially zero.Ab initio calculations are a type of quantum chemistry calculation that uses first principles to predict the properties of molecules, such as their energy, structure, and dipole moment. These calculations are based on the Schrödinger equation and involve solving it for the electronic wave function of the molecule.In the case of N2, ab initio calculations would confirm that the dipole moment is zero or very close to zero. This is because the electron distribution in the molecule is symmetric, and there is no net separation of charge between the two nitrogen atoms.