Density
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density: the amount of matter
(mass) in a given unit volume.
mass: the measure of the
amount of matter an object
contains.
viscosity: the resistance of a
liquid to flow (viscous).
buoyancy: the tendency or
capacity to remain afloat in a
liquid or rise in air or gas; the
upward force that a fluid exerts
on an object less dense than
itself.
volume: The amount of space
occupied by something –
expressed in L, mL or cm3 (or
any cubic unit).
Kermit vs.
Elephant
Explain which
has more
mass?
Volume?
Weight?
Cover the
variable you
are trying to
solve for and
the formula
will appear.
m
D
v
Both are fresh eggs (not boiled).
Tap Water
Tap Water with salt.
A block of maple wood with a volume
of 405 cubic centimeters and a
density of 0.67 g/cm3 is sawed in
half. The density of the two smaller
blocks is now_____. (Spr'03 11th -25)
A block of maple wood with a volume
of 405 cubic centimeters and a
density of 0.67 g/cm3 is sawed in
half. The density of the two smaller
blocks is now_____. (Spr'03 11th -25)
A. one-fourth the original density
B. one-half the original density
C. two times the original density
D. the same as the original density
12 grams
6 grams
6 cm
6cm
3cm
12 cm
3cm
6cm
6cm*12cm*3cm = 216 cm3
6cm*6cm*3cm = 108 cm3
12 g /216 cm3 = .05555 g/cm3
6 g /108 cm3 = .05555 g/cm3
What is the mass of a 500.00 mL
sample of seawater with a density of
1.025 g/mL? (Apr'04 10th -18)
What is the mass of a 500.00 mL
sample of seawater with a density of
1.025 g/mL? (Apr'04 10th -18)
A. 487.8 g
B. 500.0 g
C. 512.5 g
D. 625.0 g
This pipette is filled with
a 20% NaOH solution.
The solution is at 20oC
and has a density of
1.23 g/mL. According to
this information, what is
the mass of this NaOH
solution? (Apr'04 11th -27)
This pipette is filled with
a 20% NaOH solution.
The solution is at 20oC
and has a density of
1.23 g/mL. According to
this information, what is
the mass of this NaOH
solution? (Apr'04 11th -27)
A. 3.88 g
B. 15.7 g
C. 23.9 g
D. 24.6 g
Students in a chemistry lab measure
the time it takes four different 100
mL solutions to pass through a hole
in the bottom of a cup. Which of the
following properties of the solutions is
most likely being measured?
(Apr'06 10th -22)
Students in a chemistry lab measure
the time it takes four different 100
mL solutions to pass through a hole
in the bottom of a cup. Which of the
following properties of the solutions is
most likely being measured?
(Apr'06 10th -22)
A. Buoyancy
B. Mass
C. Viscosity
D. Volume
A sample of water from a stream has a
greater density than a sample of
distilled water. Which is the best
explanation for the difference in
density?
(Apr'06 10th -29)
A sample of water from a stream has a
greater density than a sample of
distilled water. Which is the best
explanation for the difference in
density?
(Apr'06 10th -29)
A. Streams have kinetic energy.
B. Distilled water has a neutral pH.
C. Streams can contain dissolved salts.
D. Distilled water can contain dissolved
gases.
The picture shows the results of pouring a blue
liquid into a clear liquid and allowing the
mixture to settle for 25 minutes. Compared to
the clear liquid, the blue liquid is more _____.
(Apr'06 11th -1)
The picture shows the results of pouring a blue
liquid into a clear liquid and allowing the
mixture to settle for 25 minutes. Compared to
the clear liquid, the blue liquid is more _____.
(Apr'06 11th -1)
A. massive
B. dense
C. viscous
D. soluble
Density (g/mL) Boiling Point (oC)
Liquid
Description
Q
Nonflammable colorless compound
1.62
59.5
R
Flammable colorless compound
0.71
34.6
S
Yellow mixture with strong odor
0.73
160.4
T
Viscous pale-yellow oil
0.93
300.0
The table shows properties of four liquids that are
insoluble in water. If the four liquids are poured
into an Erlenmeyer flask containing water, which
liquid will form a layer below the water? (Apr'06
11th -23)
Density (g/mL) Boiling Point (oC)
Liquid
Description
Q
Nonflammable colorless compound
1.62
59.5
R
Flammable colorless compound
0.71
34.6
S
Yellow mixture with strong odor
0.73
160.4
T
Viscous pale-yellow oil
0.93
300.0
The table shows properties of four liquids that are
insoluble in water. If the four liquids are poured
into an Erlenmeyer flask containing water, which
liquid will form a layer below the water? (Apr'06
11th -23)
A. Q
B. R
C. S
D. T
Swimmers find that they can float more easily
in the ocean than in a freshwater pond. The
most likely reason for this phenomenon is
that the _____. (Jul'04 11th -17)
Swimmers find that they can float more easily
in the ocean than in a freshwater pond. The
most likely reason for this phenomenon is
that the _____. (Jul'04 11th -17)
A. viscosity of pond water is greater than that
of ocean water
B. density of ocean water is higher than that
of pond water
C. temperature of pond water is lower than
that of ocean water
D. mass of ocean water is greater than that of
pond water
Compared to 250 g of gaseous
nitrogen, 250 g of liquid nitrogen has
greater _____. (Jul'04 11th -35)
Compared to 250 g of gaseous
nitrogen, 250 g of liquid nitrogen has
greater _____. (Jul'04 11th -35)
A. volume
B. temperature
C. mass
D. density
According to this information, Block Z is most likely composed of
_____. (2008 Released 11th - Obj4-1)
According to this information, Block Z is most likely composed of
_____. (2008 Released 11th - Obj4-1)
A. balsa
B. ebony
C. maple
D. poplar
A 500 mL quantity of vanilla ice cream
has a mass of 400 grams. The
manufacturer then bubbles air into the
ice cream so that its volume increases
by 300 mL. What is the ice cream’s
approximate final density?
(Oct'05 11th -18)
A 500 mL quantity of vanilla ice cream
has a mass of 400 grams. The
manufacturer then bubbles air into the
ice cream so that its volume increases
by 300 mL. What is the ice cream’s
approximate final density?
(Oct'05 11th -18)
A. 0.30 g/cm3
B. 0.50 g/cm3
C. 0.80 g/cm3
D. 1.30 g/cm3
What is the density at 20oC of 12.0
milliliters of a liquid that has a mass
of 4.05 grams?
(Spr'03 10th -31)
What is the density at 20oC of 12.0
milliliters of a liquid that has a mass
of 4.05 grams?
(Spr'03 10th -31)
A. 0.338 g/mL
B. 2.96 g/mL
C. 16.1 g/mL
D. 48.6 g/mL
Three liquids were poured into a beaker and
formed three layers. Which conclusion is best
supported by the information above?
A The mass of Liquid 2 is greater than the mass of Liquid 3.
B The volume of Liquid 1 is less than the volume of Liquid 3.
C The density of Liquid 3 is greater than the density of Liquid 2.
D The buoyancy of Liquid 2 is greater than the buoyancy of Liquid