Chemistry
Study Guide Review
2015
Two Cubes of Aluminum
Property
Same or Different
Material
Same
Mass
Different
Volume
Different
Same
Density
Cube A is copper and Cube B is pine
Property
Same or Different
Material
Different
Mass
Volume
Different
Same
Density
Different
Cube A is copper and Cube B is pine
Property
Material
Same or Different
Mass
Different
Different
Volume
Different
Density
Different
Which is a pure substance and which
is a mixture?

air:
mixture
 helium: Pure substance- element
 oxygen: Pure substance- element
 CO2: Pure substance- compound
 water: Pure substance- compound
 chocolate milk: Mixture
 sugar dissolved in water: Mixture
Identify which tool is used to
measure each property:
 mass:
 length:
Triple beam balance
Ruler
 volume (liquid or irregular solid):
Graduated Cylinder
Draw a ball-and-stick model for
each of the following
compounds:
H2O
FeO2
NH4
Identify the units of the measuring
tool.
Tool
Triple Beam Balance
Ruler
Graduated Cylinder
Units
g
cm
mL OR cm3
Given the chemical formula for sodium
acetate (NaC2H3O2), answer the
following questions:
1
elements
a. How many molecules are present?
b. What do the symbols represent?
c. Identify the name for each symbol below.
sodium
Na: _____________________
carbon
C: _____________________
H:
hydrogen
_____________________
oxygen
O: ______________________
Given the chemical formula for sodium
acetate (NaC2H3O2), answer the
following questions:
d. How many atoms of each element are
there?
Sodium: 1
Carbon 2
Hydrogen: 3
Oxygen: 2
d. If the formula was 3NaC2H3O2, which of the
above answers would change? Explain.
The # of Molecules AND the # of atoms of
each element would be multiplied by 3
Identify each as a chemical
or physical change.
 rust forming on a railing: Chemical Change
 sugar dissolving in water: Chemical Change
Physical Change
 water evaporating:
Chemical Change
 wood burning:
Two different objects are investigated
by a group of students. They measured
the mass and volume of each bar and
recorded the results in the table below.
Object
A
B
Mass
120 g
85 g
Volume
100 cm3
100 cm3
Calculate the density of each bar of
soap.
A: 1.2 g/cm3
B: 0.85 g/cm3
A: 1.2 g/cm3
B: 0.85 g/cm3
 Draw and label the positions of the objects in a
container of water.
A
B
 Explain why you drew each object in the position
selected.
Soap A is MORE dense than water so it
FLOATS and Soap B is LESS dense than
water so it SINKS.
You want to determine the density of
a rectangular eraser.
a. What two properties are used to determine
density?
Mass & Volume
b. Describe how you measure the properties
identified in a. Identify any tools that would be
used.
Mass- TBB & Volume- ruler
a. Explain how the measurements you described
in part b can be used to determine the density
of the eraser.
Mass/Volume = Density