The Cl-Br molecule is an example of a substance that has a permanent dipole in the molecules. Explain why there is a dipole in this molecule. ​

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium