9. How many electrons are involved in π (pi) bonding in benzene (C₆H₆)? (A) 18 (B) 6 (C) 30 (D) 3 (E) 12

10. Consider the following Lewis structure. (Lone pairs are not drawn in.) Which statement about the molecule is false? (A) This molecule contains 28 valence electrons. (B) C-2 is sp² hybridized with bond angles of 120°. (C) Oxygen is sp³ hybridized. (D) There are 10 σ (sigma) and 2 π (pi) bonds. (E) There are some H–C–H bond angles of about 109° in the molecule.