Multiple choice Which of the following have coordinate covalent bonds? Br2 and HCl Cl2 and F2 NH4+ and H3O+ FeCl3 and H2SO4 Reveal answer Fill a bubble to check yourself C Correct answer Explanation Hydronium ion contains 2 polar covalent bonds and 1 coordinate covalent bond. Ammonium ion contains 3 polar covalent bonds and 1 coordinate covalent bond.