H2 (g) + Cl2(g) → 2HCl (g) + 185kJ How many kilojoules of heat energy is released if 2.5 moles of H2 reacts with an excess of chlorine gas?

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull