Which of the following best describes the resonance hybrid of the acetate ion ${\mathrm{CH}}_3{\mathrm{COO}}_{-}$?

Given the following resonance structures of the acetate ion: (I) ${\mathrm{CH}}_{3}C=O-$, (II) ${\mathrm{CH}}_{3}C-O=$, and (III) ${\mathrm{CH}}_{3}C-O-$, rank the structures from most to least stable.

Which of the following does not represent a pair of resonance structures?

Which of the following statements correctly describes the resonance structures of $C_3{H}_3{N}_3$ (methyl azide, $\mathrm{CH}{3}_{1}N{3}_1$)?

Given the structure of $O_3$ (ozone) as $O=O-O$, which of the following is a correct resonance structure?

Which of the following statements about the resonance structures of the formate ion (${\mathrm{HCO}}_{-}$) is correct?

Which of the following correctly represents a valid resonance structure for the cyanate ion $C_N{-}^1$ ($\mathrm{CNO}-$)?