3SAS pg.235 #31-38

31) 
a.  Propane, C3H8
b. Hexane, C6H14

32) The prefix -ane implies the number of atoms in the backbone carbon chain. 

33) Yes, because they all contain identical molecule formulas, but different arrangments of atoms. 

34) 

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

36) A linear chain is where each carbon atom is only linked to one or two other carbon atoms and a zig-zag chain is where one atoms is linked to three or four carbon atoms. 

37) 
a. 

b. The branch-chain insomer because it has less surface area for intermolecular forces. 

38) 
a. short, straight-chain because it has more surface area for intermolecular forces. 
b. short, straight-chain
c. short, straigh-chain