# The density of platinum is 21.4 g/cm 3

advertisement ```Name_______________________
Unit 2 – 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?
2.
If two objects have the same volume, but object A has greater mass than
object B, which one will have the greater density?
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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.
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4.
How can you use the water displacement method to find the volume of an
irregular solid?
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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 for solid objects &amp; not mL when giving your answer.
6.
What is the density of water?
7.
Will an object with a density of 0.86 g/cm3 sink or float in water? How do
you know?
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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?
9.
A marble statue has a mass of 6,200 grams and a volume of 2,296 cm3.
What is the density of marble?
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.
11. The density of cork is 0.24 g/cm3. What is the volume of a 240-gram piece
of cork?
12. The density of gold is 19.3 g/cm3. What is the volume of a 575-gram bar of
pure gold?
13. The density of mercury (a liquid metal) is 13.6 g/mL. What is the volume of
a 155-gram sample of mercury?
14.
If 89.2 mL of a liquid has a mass of 75.2 g, calculate the liquid’s density.
15. A cube of metal has a mass of 1450 g and displaces 542 mL of water when
immersed. Calculate the density of the metal.
For numbers 16 – 25 use the chart to answer the questions.
Densities of Common Substances @ 20&deg;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)
17.
Mercury (Hg)
18.
Benzene (C6H6)
19.
Silver (Ag)
20.
Gold (Au)
Calculate the mass of 40.0 cm3 of each of the following substances:
21.
Iron (Fe)
22.
Lead (Pb)
23.
Aluminum (Al)
24.
Copper (Cu)
25.
Magnesium (Mg)
Densities of Common Substances @ 20&deg;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
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