Measurements: Density
DENSITY is the amount of
of some material.
MASS_
contained in a given
VOLUME
The following boxes are the SAME VOLUME. Assume all the balls have Equal
mass.
Which box is denser?
The box on the LEFT has
GREATER DENSITY than
the box on the right because
is has MORE MASS IN
THE SAME VOLUME
EQUAL VOLUME BOXES WITH DIFFERENT
MASSES BOX ON LEFT IS MORE DENSE THAN BOX ON RIGHT
MATHMATICAL STATEMENTS OF DENSITY
Density is the ratio of an object’s ___MASS___ to its __VOLUME__.
DENSITY = MASS or D= grams (g)
VOLUME
liters (L)
The density of SOLIDS
is stated in terms of
The density of LIQUIDS
is stated in terms of g/mL
g/cm3
.
.
To determine the DENSITY of a material, measure its MASS on a
and
determine its VOLUME. Then
the MASS by the VOLUME.
EXAMPLES
1. Calculating density with known mass and volume:
a. determine the density of a material that has a mass of 36g and
volume of 2.5 cm3.
D = m = 36g = 14.40 g/cm3
v
2.5 cm3
2. Calculating volume with known mass and density:
a. find the volume of 50g of olive oil if the density of olive oil is
0.80g/mL.
v = m/d= (50g)/(0.80 g/mL) = 62.50 mL
NAME__________________ Period: _______ Date: ______________
Measurement: Density
Physical Science
Density Practice Worksheet
1. Calculating density with known mass and volume:
a. find the density of a 25g object that displaces 7.5mL of water.
(1 mL = 1 cm3)
D = m = 25g = 3.33 g/mL
v
7.5 mL
2. Calculating volume with known mass and density:
a. find the volume of 25.0g of gold if the density of gold is 19
g/cm3.
v = m/d= (25.0 g) /(19 g/cm3) = 1.32 cm3
3. Calculating mass with known density and volume:
Find the mass of a 3.5 cm3 bar of gold. (density is 19 g/cm3)
m = dv = (19 g/cm3) x (3.5 cm3) = 66.50 g
4. The density of lead is 11.4 g/cm3. What is the mass of a piece of
lead that has a volume of 19cm3?
M = (11.4 g/cm3)( 19cm3) = 216g
M=DV
5. What is the volume of a sample of cough syrup that has a mass of
50.0 g? Then density of cough syrup is 0.95 g/cm3.
V = M/D
V = 50.0 g / 0.95 g/cm3= 52.6 cm3
6. Aspirin has a density of 1.40 g/cm3. What is the mass of a 25.0 mL
sample of aspirin? (1 mL = 1 cm3)
M=DxV
M = (1.40 g/cm3)( 25.0 cm3) = 35g
7. In the boxes below (all the same size), the dark circles represent
particles of matter (each particle has the same mass). Which box
has the greatest density?
Box C has the
greatest
density. It has
the MOST
particles in the
given space.
A
B
C
D