Density
Molecular View
• The closer the molecules are in a given volume, the greater the objects density.
Least Dense Density is a ____________ to _________ ratio
Mass-200g
Volume- 100cm3
Density-
D = _____ g/cm3
Formula:
Most Dense Mass–
VolumeD=
MassVolumeD=m/v =
D = _____ g/cm3
D = _____ g/cm3
In Conclusion:
• If an object is cut in half à _______________________________
•
What type of property is density? __________________________
Density Calculations
D=
M=
V=
Example 1: A block of wood 3 cm on each side has a mass of 27 g. What is the density of the block?
Example 2:What is the mass of an object if its density is 2 g/mL and its volume is 5 mL?
Example 3:
What is the volume of a liquid with a density of 2.0 g/mL and a mass of 8 g?
1 Example 4: What is density of a penny that weighs 2.49 grams and when placed in a graduated cylinder filled
with water, the water rose from 10.0 mL to 10.5 mL.
On Your Own:
1.)
5.0 mL of ethanol has a mass of 3.9 g, and 5.0 mL of benzene has a mass of 44 g. Which liquid is
denser?
2.)
What is the volume of your shoe- if the density is 0.85 g/mL and the mass is 60 grams.
Density Column
• When several immiscible liquids are combined, they form layers or a density column.
• The liquids will order themselves according to their densities
o smaller density à ___________
o larger density à __________
•
Build your own Density Column! (directions on the screen)
Color
Density
(g/mL)
Object
Density
(g/mL)
red
1.00
granite rock
2.75
green
0.75
plastic block
1.04
blue
1.10
Ivory soap
0.9
orange
1.25
wood block
0.65
2