An arbitraty surface enclose a dipole. What is the electric flux through this surface?

The electric flux through the surface

A point charge of 2.0 muC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?

What is the unit of electric flux?

What can be concluded if the electric flux through a closed surface is zero?

A point charge of 10^-7 colulomb is situated at the centre of a cube of 1 m side. Calculate the electric flux through its surface.

Careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the surface of the box is 8.0 xx 10^3 Nm^2//C . What is the net charge inside the box?