1. Density
Chapter 2

2. Density
Density is a physical property
Less Dense
More Dense

3. Density
Density is the ratio of mass to volume, or mass divided by volume.
The derived SI unit is kilograms per cubic meter, kg/m3
g/cm3 or g/mL are also used
Density =
mass
volume

4. Density Pyramid
Density
Mass
Volume

5. Practice Problems
A sample of aluminum metal has a mass of 8.4g. The volume of the sample is 3.1cm3. Calculate the density of aluminum.
Density
mass
volume

6. Answer #1 mass 8.4 g Given: mass(m) = 8.4g volume(V)= 3.1cm3
Unknown: Density (D)
Density =
mass
volume
8.4 g
3.1 cm3 =
= 2.71 g/cm3

7. Practice Problems
2. A diamond has a density of 3.26 g/cm3. What is the mass of a diamond that has a volume of cm3
Density
mass
volume

8. Answer #2 Given: Density (D) = 3.26 g/cm3 volume(V)= 0.351cm3
Unknown: Mass(m)
Mass (m) = (Density)(Volume)=
(3.26 g/cm3)(0.351cm3) = 1.14 g

9. Practice Problems
3. What is the volume of a sample of liquid mercury that has a mass of 76.2g, given that the density of mercury is 13.6g/mL.
Density
mass
volume

10. Answer #3 mass 76.2 g Given: Mass(m) = 76.2g Density(D)= 13.6 g/mL
Unknown: Volume(V)
Volume =
mass
Density
76.2 g
13.6g/mL =
= 5.60 mL