Draw all resonance contributors for each of the following molecules or ions. Be sure to include the curved arrows that indicate which pairs of electrons are shifted in going from one resonance structure to the next. (a) CH3NO2 (b) CH, CO, (c) CH CHCHCH2 (the ion has two C-C single bonds) (d) C5H5N (a ring is formed by the C and N atoms, and each H is bonded to a C atom) (e) C4H5N (a ring is formed by the C and N atoms, and the N is bonded to one H atom, and each C atom is bonded to one H atom)

Draw Lewis structures and any contributing resonance structures for each structure below. Use the proper type of arrow to indicate that they are resonance structures. In which structure is resonance more important? (a) H2SO3 (b) (HSO3)^1- (c) (SO3)^2-

Formic acid has the chemical formula HCOOH. It is a colorlessliquid that has a density of 1.220 g/mL. (a) The carbonatom in formic acid is bound to one H and both O’s. Drawthe Lewis structure for formic acid, showing resonance ifpresent. (b) Formic acid can react with NaOH in aqueoussolution to produce the formate ion, HCOO-. Write thebalanced chemical equation for this reaction. (c) Draw theLewis structure of the formate ion, showing resonance ifpresent. (d) How many milliliters of a 0.100 M solution ofNaOH would it take to completely react with 0.785 mL offormic acid?

(a) Complete the Lewis structure for vinyl chloride by showing all unshared pairs of electrons. (b) Predict the H-C-H, H-C-C, and Cl-C-H bond angles in this molecule. (c) Does vinyl chloride have polar bonds? Is it a polar molecule? Does it have a dipole?