2. What is the formal charge on nitrogen in the following structure? A) 2 B) 1 - C) 2+ D) 1+ E) 0 3. What is the correct Lewis structure for hydrazoic acid (HN3) including the formal charges, if any? A) I B) II C) III D) IV E) V 4. Which of the following compounds have both polar covalent and ionic bonds? A) NH4Br B) H2O2 C) HCN D) H2S E) None of these 5. Constructive interference of waves results in A) a wave with smaller amplitude B) a wave with larger amplitude C) cancellation of both waves D) formation of a node E) Both C \& D