Density

1
Chapter 3.4

• Density
• The ratio between the objects mass and its
  volume.

2
SI Units
Base Unit
Abbrev.
Symbol
Quantity
Length
meter
m
l
Mass
kilogram
kg
m
Volume
cm3
v
cubic centimeter
Temp
kelvin
K
T
3
Density
Mass Volume

• Density
• Density is a characteristic (physical) property
  that depends only on the composition of a
  substance, not on the size of the sample.
• The composition of a mixture can vary therefore
  the density can vary.

M V
D
4
Density
Mass (g)
Volume (cm3)
5
Sample Problem 3-5

• A copper penny has a mass of 3.1g and a volume of
  0.35 cm3. What is the density of copper?

Density mass volume
Density 3.1g 0.35 cm3
8.8571 g/cm3
8.9 g/cm3