A liquid polymer weighs 4.35 lb and occupies 1.559 L. What is the density of the polymer in grams per cubic centimeters?

Answer 1

Jesse E's approach is correct.

Density is mass per volume.

You first convert the mass to grams.

However, the volume converted was not 1 L (or 1 cc). 4.35 lbm occupies 1.559 L, not 1.0 L.

As such, you would have:

4.35 lbm * 453.6 g * 1.0 L = 1.266 g

1.559 L 1 lbm 1000 cc cc

Answer 2

Use the following conversion factors:

1 L = 1000 cc

1 lb = 453.6 grams

Convert lbs to grams:

4.35 lbs (453.6 g/1 lb) = 1973.16 grams

Find the density:

1973.16 grams/ 1000 cc = 1.97 g/cc