Unit 3 SAS #31-38 (pg. 235)

31. a. Propane - C3H8
      b. Pentane - C5H12

32. The prefix indicates the number of carbon atoms in the backbone carbon chain. 

33. They are all isomers since they have identical molecular formulas but different arrangements of atoms.

34. 


35. Butane

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

37. a.
 
      b. The branch-chain molecule would have a lower boiling point because it would be easier to break apart from each other. 

38. a. Short straight chain because it has less surface area
      b. Short branched chain because it has less surface area
      c. Short branched chain because it has less surface area