CHEM 108 Exam 3 UW–Madison – Study Guide, Practice Questions &
Chemistry Review
polymer - correct answer ✔✔organic compound made up of chains of smaller units bonded
together.
monomer - correct answer ✔✔A small molecule that combines with many other monomers to
form a polymer.
Natural Polymers - correct answer ✔✔Starch
Cellulose
Spider Webs
Synthetic Polymers - correct answer ✔✔Nylon
Polymethylene
Polystyrene
What was the problem with celluloid? - correct answer ✔✔It was extremely flammable
What is the main source of synthetic polymers - correct answer ✔✔crude oil
Alkene - correct answer ✔✔Double bond between carbons
Polyethylene - correct answer ✔✔An addition polymer formed from ethylene monomers
the change in molecular geometry as ethylene becomes polyethylene - correct answer
✔✔trigonal planar to tetrahedral
, Initiation with radical - correct answer ✔✔
Why is R- called a free radical - correct answer ✔✔it has an unpaired electron
in the initiation step - correct answer ✔✔1 bond is broken, one bond is formed
the chain reaction of a radical - correct answer ✔✔
termination of radical - correct answer ✔✔
In the termination step - correct answer ✔✔two half arrows are needed and one bond is
formed
LDPE - correct answer ✔✔Density- 0.93
Chain length- 500
Branching- amorphous
weaker plastic bags
saran wrap
HDPE - correct answer ✔✔Density- 0.96
Chain Length- 10,000
crystalline
milk jugs
shorter interactions
Chemistry Review
polymer - correct answer ✔✔organic compound made up of chains of smaller units bonded
together.
monomer - correct answer ✔✔A small molecule that combines with many other monomers to
form a polymer.
Natural Polymers - correct answer ✔✔Starch
Cellulose
Spider Webs
Synthetic Polymers - correct answer ✔✔Nylon
Polymethylene
Polystyrene
What was the problem with celluloid? - correct answer ✔✔It was extremely flammable
What is the main source of synthetic polymers - correct answer ✔✔crude oil
Alkene - correct answer ✔✔Double bond between carbons
Polyethylene - correct answer ✔✔An addition polymer formed from ethylene monomers
the change in molecular geometry as ethylene becomes polyethylene - correct answer
✔✔trigonal planar to tetrahedral
, Initiation with radical - correct answer ✔✔
Why is R- called a free radical - correct answer ✔✔it has an unpaired electron
in the initiation step - correct answer ✔✔1 bond is broken, one bond is formed
the chain reaction of a radical - correct answer ✔✔
termination of radical - correct answer ✔✔
In the termination step - correct answer ✔✔two half arrows are needed and one bond is
formed
LDPE - correct answer ✔✔Density- 0.93
Chain length- 500
Branching- amorphous
weaker plastic bags
saran wrap
HDPE - correct answer ✔✔Density- 0.96
Chain Length- 10,000
crystalline
milk jugs
shorter interactions
