1. (a) 1 (b) 2 (c) 3 (d) 500-20,000
3. Four examples of natural polymers are celluloid, shellac, clay, stone, and many others. Some examples of synthetic polymers are paint components, fabrics, rubber, insulating materials, foams and many others.
6. Unsaturated hydrocarbons have one or more double or triple bonds. Alkenes, which contain carbon-carbondouble bonds are described as unsaturated hydrocarbons. Not all carbon atoms are bonded to their full capacity with four other atoms. Because of their double bonds, alkenes are more chemically reactive, which makes them better builder molecules than alkanes.
13.
SBS #11-12
11. (a) ii (b) iii (c) i
12. The other 75% is lost to the surrounding as thermal energy.
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