1. 3.4 Density
More Calculations!

2. Definition
Density is the ratio of the mass of an object to its volume.
Density = mass/volume
UNITS
Mass  g
Volume  cm3 or mL

3. Memory…

4. Example
If an object has a mass of 5.4 grams and a volume of 6.23 mL, what is its density?
Answer: 0.87 g/mL
If an object has a density of g/cm3 and a volume of 3cm3, what is its mass?
Answer: 3 X 101g

5. DENSITY

6. More Complicated Problems
An object with a volume of 15.2kL has the density of g/mL. What is its mass?
Answer: 3.90 X 107 grams
An object that takes up 2659 dL of space and weighs hectograms has what density (g/L)?
Answer: 1.3 X 10-2 g/L