For the molecular formulas given below, give the number of elements of unsaturation. Select the appropriate structure as an example for each.

(i) C₆H₇NO₂

(ii) C₇H₅BrIN

Which of the following are constitutional isomers of an alkane with a molecular formula of C₈H₁₈?

Draw the structural isomers with the molecular formula C₄H₈ that do not show cis/trans isomerism and have a carbon-carbon double bond.

Show all 4 acyclic isomers with the formula C₃H₅Cl. (Note: If applicable, include stereoisomers.)

Determine all the pushable electron pairs and the regions where they can be pushed in the structure below. Also, provide one valid resonance structure.

Draw all the resonance contributors of the given species and predict their relative stabilities. Also, draw its resonance hybrid.

Provide the resonance forms of the radical shown below.

Determine the appropriate hybridization of all indicated atoms in the following organic compounds.

Determine the hybridization of the carbon atoms.

What are the hybridizations and molecular geometries around the highlighted atoms?

Predict the molecular geometry and the Lewis structure of HCO ₂^–.

Keeping the resonance in mind, suggest the hybridization and geometry of the central atoms (only carbon and nitrogen) in the given species.

Select all sets that correctly describe the Lewis structure, the contribution of bond dipole moments and non-bonding pairs of electrons to the molecular dipole moment, and an estimation of the magnitude of the dipole moment for compounds CH₂=NCH₃, CH₃OH and CCl₄.

(1) Small molecular dipole moment.                     (2) Small molecular dipole moment.

(3) Large molecular dipole moment.                 (4)  Small molecular dipole moment.

(5) Zero molecular dipole moment.