3SAS 31-38 p.235

31. a. C3H8
        b. C5H12

32. -ane designates an alkane.

33. Yes because they have identical molecular formulas but different arrangements of atoms.

34.

35.  Butane is the shortest-chain alkane that can demonstrate isomerism.

36. Because straight-chain alkanes, where each carbon atom is only linked to one or two other carbon atoms, and in branched-chain alkanes, one carbon atom can be linked to three or four other carbon atoms.

37.

38. a. short chain because there is less surface area for inter molecular forces.

      b. short chain because there is less surface area for inter molecular forces.

      c. short chain because there is less surface area for inter molecular forces.