Name_______________________
Unit 2(adv) – Properties of Matter/Density Test
Per._______ Date_____________
Answer the questions completely. SHOW ALL MATH WORK and DON’T forget to include the units!
1.
What is the mathematical equation for density?
Density = mass/volume or D=m/v
2.
If two objects have the same volume, but object A has greater mass than
object B, which one will have the greater density?
Object A because if density = m/v, and the first one has more mass, this would
make the density greater.
3.
Imagine that you have a cube of copper and a cube of
aluminum, which are exactly the same size and shape.
When you place them each on an electronic balance, you
find that the copper cube has more mass than the aluminum
cube.
Give one possible reason why the copper cube has more mass.
Copper atoms each have a greater atomic mass than aluminum atoms.
or
Copper atoms are smaller so that more of them can fit in a cube.
or
Copper atoms are arranged closer together so that there are more atoms in the cube.
4.
How can you use the displacement method to find the volume of an
irregular solid?
First you put water in a graduated cylinder and check the initial volume. Then you place
the sample all the way into the water and see the final level where the water is. Then you
subtract the initial volume from the final volume. This will give you the volume of the
sample.
5.
What is the volume of an object that made the water level rise in a
graduated cylinder from 50 mL to 59 mL? Remember that volume is
measured in cm3 and not mL when giving your answer.
The volume of the object would be 9 cm3.
6.
What is the density of water?
The density of water is 1 g/cm3.
7.
Will an object with a density of 0.86 g/cm3 sink or float in water? How do
you know?
It will float because its density is less than the density of water, which is 1 g/cm 3.
8.
A solid rubber stopper has a mass of 33.0 grams and a volume of 30.0 cm3.
What is the density of rubber?
D = M/V = 33.0g /30.0 cm3 = 1.1 g/cm3
9.
A marble statue has a mass of 6,200 grams and a volume of 2,296 cm3.
What is the density of marble?
D = M/V = 6200 g / 2296 cm3 = 2.7 g/cm3
10. What is the mass of a pure platinum disk with a volume of 113 cm3?
The density of platinum is 21.4 g/cm3.
M = D * V = 113 cm3 * 21.4 g/cm3 = 2418.2 g
11. The density of cork is 0.24 g/cm3. What is the volume of a 240-gram piece
of cork?
V = M/D = 240 g /0.24 g/cm3 = 1,000 cm3
12. The density of gold is 19.3 g/cm3. What is the volume of a 575-gram bar of
pure gold?
V = M/D = 575 g / 19.3 g/cm3 = 29.79 cm3
13. The density of mercury (a liquid metal) is 13.6 g/mL. What is the volume of
a 155-gram sample of mercury?
V = M/D = 155 g /13.6 g/mL = 11.4 mL
14.
If 89.2 mL of a liquid has a mass of 75.2 g, calculate the liquid’s density.
D = M/V = 75.2 g / 89.2 mL = 0.84 g/mL
15. A cube of metal weighs 1450 g and displaces 542 mL of water when
immersed. Calculate the density of the metal.
D = M/V = 1450 g / 542 cm3 = 2.68 g/cm3
For numbers 16 – 25 use the chart to answer the questions.
Densities of Common Substances @ 20°C
Substance
Density
(g/cm3)
0.00133
Oxygen
Hydroge 0.000084
nEthanol
0.785
0.880
Benzene
1.000
Water
1.74
Magnesiu
m
2.16
Sodium
chlorid
e
Substance
Aluminum
Iro
n
Copp
er
Silve
rLea
d
Mercury
Gol
d
Density
(g/cm3)
2.70
7.87
8.96
10.5
11.34
13.6
19.32
Calculate the volume of 60.0 g of each of the following substances:
16.
Sodium chloride (NaCl)
V = M/D = 60 g / 2.6 g/cm3 = 23.08 cm3
17.
Mercury (Hg)
V = M/D = 60 g / 13.6 g/mL = 4.41 mL
18.
Benzene (C6H6)
V = M/D = 60 g / 0.880 g/mL = 68.18 mL
19.
Silver (Ag)
V = M/D = 60 g / 10.5 g/cm3 = 5.71 cm3
20.
Gold (Au)
V = M/D = 60 g / 19.3 g/cm3 = 3.11 cm3
Calculate the mass of 40.0 cm3 of each of the following substances:
21.
Iron (Fe)
M = D * V = 40 cm3 * 7.87 g/cm3 = 314.8 g
22.
Lead (Pb)
M = D * V = 40 cm3 * 11.34 g/cm3 = 453.6 g
23.
Aluminum (Al)
M = D * V = 40 cm3 * 2.7 g/cm3 = 108 g
24.
Copper (Cu)
M = D * V = 40 cm3 * 8.96 g/cm3 = 358.4 g
25.
Magnesium (Mg)
M = D * V = 40 cm3 * 1.74 g/cm3 = 69.6 g
Densities of Common Substances @ 20°C
Substance
Density
(g/cm3)
0.00133
Oxygen
Hydroge 0.000084
nEthanol
0.785
0.880
Benzene
1.000
Water
1.74
Magnesiu
m
2.16
Sodium
chlorid
e
Substance
Aluminum
Iro
n
Copp
er
Silve
rLea
d
Mercury
Gol
d
Density
(g/cm3)
2.70
7.87
8.96
10.5
11.34
13.6
19.32
STOP