1 Use the molecular models to decide whether the following two structures are different or the same If you



2.Draw all the structures of all the constitutional isomers of C5H12. Label all those isomers that are straight-chain hydrocarbons.

3. Build the cis and trans isomers of CH3CH=CHCH2CH3, and draw their structures below. Label each structure as cis or trans.

4. Build cyclohexane (C6H12, a cyclic hydrocarbon), and rotate the bonds to obtain the boat and chair conformations.

5. Build cyclohexene [C6H10] and benzene [CH6], and draw their structures below.