2. Isomers

3. Structural Isomers 1.a) Butane (C 4 H 10 ) 2-methylpropane (C 4 H 10 ) 2. 1-butene2-butene 2-methylpropene cyclobutane methylcyclopropane CH 3 CH 2 CH 2 CH 3 CH 3 CHCH 3 CH 3

4. 3.a) C 4 H 8 has more isomers because the position of the double affects the name and because ring structures can be drawn. 4. aldehydeketone alcohols ether

5. 5.The OH bond is polar, the CO bond is less polar, thus the alcohol would have the higher boiling point and be soluble in water. 6.b) 1,2-dichloroethene requires cis or trans. 1,2-dichloroethane does not require cis or trans because they would both represent the same molecule (to move chlorine from the same side to opposite sides only requires that the C – C single bond be rotated). 7. trans-1,2-dimethylcyclopentane cis-1,2-dimethylcyclopentane

6. 8.1,1-dimethylcyclopentane 9.a) not isomers (they dont have the same chemical formula: C 5 H 12 vs. C 5 H 10 ) b) structural isomers c) geometric isomers d) not isomers (both diagrams represent the exact same molecule)

7. 11.Monomer: the smallest repeating unit of a polymer (propene in polypropylene). Polymer: a long chain molecule made up of many small identical units (monomers). Addition polymerization: a reaction in which unsaturated monomers combine with each other to form a polymer. 12.Teflon, polypropylene, polyester, polyethylene (pop bottles, grocery bags), polystyrene (packing material), Plexiglas, polyvinyl chloride (vinyl), natural rubber, etc. Polymers For more lessons, visit www.chalkbored.com www.chalkbored.com