Density Calculations Pretest

Working with density involves at least three factors: (1) understanding the concept of density, (2) calculating a value for density given the appropriate information, and (3) using a value for density to convert between mass and volume. This pretest has questions on the last two of these. Answers can be found at the bottom of the page.

1. What would be the mass of a 7.0 mL sample of material if it had a density of 5.0 g/mL?

a.   0.71 g
b.   1.4 g
c.   2.0 g
d.   12 g
e.   35 g

2. What would be the volume of a 7.0 g sample of material if it had a density of 5.0 g/mL?

a.   0.71 mL
b.   1.4 mL
c.   2.0 mL
d.   12 mL
e.   35 mL

3. What would be the volume of a 5.0 g sample of material if it had a density of 7.0 g/mL?

a.   0.71 mL
b.   1.4 mL
c.   2.0 mL
d.   12 mL
e.   35 mL

4. Calculate the density of a material for which a 6.4 mL sample has a mass of 13.203 g.

a.   0.48 g/mL
b.   0.48473 g/mL
c.   2.0629 g/mL
d.   2.1 g/mL
e.   6.8 g/mL

5. Use the following data to calculate the density of the metal.

Volume of water in cylinder without metal = 6.0 mL
Volume of water and metal in cylinder = 9.0 mL
Mass of water and cylinder without metal = 32.0 g
Mass of water and metal and cylinder = 40.0 g

a.   0.23 g/mL
b.   0.38 g/mL
c.   1.5 g/mL
d.   2.7 g/mL
e.   4.4 g/mL

Answers

1. e. 35 g

2. b. 1.4 mL

3. a. 0.71 mL

4. d. 2.1 g/mL

5. d. 2.7 g/mL

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E-mail instructor: Eden Francis