Author Question: Which would you expect to be more viscous, a polymer made of long molecular strands or one made of ... (Read 120 times)

nmorano1 · **on:** Jul 29, 2018

Which would you expect to be more viscous, a polymer made of long molecular strands or one made of short molecular strands? Why?

A) short molecular strands because of a greater density
B) long molecular strands because they tend to tangle among themselves
C) short molecular strands because their ends are typically polar
D) long molecular strands because of a greater molecular mass

Question 2

Would you expect polypropylene to be denser or less dense than low-density polyethylene? Why?

A) Polypropylene should be more dense because because it has a greater molecular mass.
B) Polyproylene should be more dense because its molecules are able to pack more closely together.
C) Polyproylene should be less dense because its molecules are not able to pack together as tightly.
D) Polypropylene should be more dense given that the polyethylene is already known to be of low density.