 Characteristic
Physical Properties: a
physical property that is unique to a
substance and that can be used to
identify the substance
Density: a measure of how much mass is
contained in a given unit volume of a substance
D=m
V
are usually g/cm3 (for a solid) and
g/mL (for a liquid)
 Units
 Example
of DENSITY:

A puffy marshmallow has the SAME MASS as a
squished marshmallow

However, a puffy marshmallow has a greater
volume, so its mass-to-volume ratio is different,
meaning its density
is different!
vs.
G
iven: What information is given to you in the question?
R equired: What is the question asking you to solve for?
A
nalysis: What formula are you using?

S
Isolate the variable you need to solve for here
olution: Solve your problem

Include your calculations
S
tatement: ‘Therefore’ statement that answers the
question

Include final answer using the correct significant digits

What is the density of a substance that has a volume of
36cm3, and a mass of 412g?
G:
R:
A:
S:
V = 36cm3, m = 412g
D=?
D=m÷V
D = 412g ÷ 36cm3
= 11.4 g/cm3
= 11 g/cm3 (Don’t forget to include the correct number
of significant digits in your final answer)
S: Therefore, the density of the substance is
11 g/cm3.

What is the mass of a block of aluminum that has the
dimensions 12cm, 24cm and 6.5cm, and a density of
2.7g/cm3 ?
G: D = 2.7g/cm3
l = 12cm, w = 24cm, h = 6.5cm
R: m = ?
A: m = D x V ( rearrange D=m÷V) *V = l x w x h
S: m= 2.7g/cm3 x 1872cm3
V = (12cm)(24cm)(6.5cm)
= 5054.4 g
= 5.1 x 103 g
= 1872cm3
S: Therefore, the mass of the block of aluminum is
5.1 x 103g.
Freezing Point: is the temperature at which a
substance turns from a liquid into a solid
Melting Point: is the temperature at which the
substance turns from a solid into a liquid

e.g. 0°C is the freezing point of pure water
and the melting point of pure ice
Boiling Point: is the temperature at which a
substance changes state rapidly from a liquid
to a gas

e.g. the boiling point of water is 100°C
NOTE: The temperature at which a substance
changes state depends on the particles’
composition and structure of the substance, and
thus, is unique to each substance!
Homework:
 Read pg. 192-198 in textbook and do
Q: #1, 4-10 on pg. 198
 Complete Density Calculations Worksheet