Worksheet # 3
GRADED
Problem 1 &2
If the mass of 50 mL of gasoline is 34 g,
1. What is its density?
2. Will gasoline float or sink if dropped in a
basin full of water?
(Note: Density of Water = 1 g/mL)
Problem 3
3. Mercury has a density of 13.55 g/cm3. If
250 mL of mercury is to be used in
constructing a mercury thermometer. What
would be the mass of the mercury?
Problem 4.
4. An irregularly-shaped sample of aluminum
(Al) is put on a balance and found to have a
mass of 43.6 g. The student decides to use
the water-displacement method to find the
volume. The initial volume reading is 25.5 mL
and, after the Al sample is added, the water
level has risen to 41.7 mL. Find the density of
the Al sample in g/cm3. (Remember: 1 mL =
1 cm3.)
Problem 5,6, & 7
30.0 g of each of the following acids are needed.
Find the volume of each that must be measured out
in a graduated cylinder.
5. hydrochloric acid (HCl), density = 1.164 g/mL
6. sulfuric acid (H2SO4), density = 1.834 g/mL
7. nitric acid (HNO3), density = 1.251 g/mL
PROBLEM 8, 9, 10
Promethium has a density of 7.26 grams/cm3
and Europium has a density of 5.24 g/cm3.
8. Which would have the greater mass,
12
cm3 of Promethium or 17 cm3 of Europium?
9 & 10 ENCIRCLE THE MASS OF BOTH
METALS.
DENSITY OF WATER = 1 g/mL
SINK/FLOA
DENSITY
T
FORMULA
MASS
VOLUME
11
45 grams
30 mL
12
13
14
15
8 mL
0.45 g/mL
16
17
100 grams
18
2.5 g/mL
19
20
84 grams
112 mL
21
22
23
24
20 mL
0.99 g/mL
25
Problem 1 &2
If the mass of 50 mL of gasoline is 34 g,
1. What is its density? 0.68 g/mL
D= M/V= 34g / 50 mL= 0.68 g/mL
2. Will gasoline float or sink if dropped in a
basin full of water? Float because if the
density is lower it will float.
(Note: Density of Water = 1 g/mL)
Problem 3
3. Mercury has a density of 13.55 g/cm3. If
250 mL of mercury is to be used in
constructing a mercury thermometer. What
would be the mass of the mercury?
3,387.5 grams
M= D x V= 13.55 g/cm3 x 250 mL= 3,387.5 g
Problem
4.
4. An irregularly-shaped sample of aluminum
(Al) is put on a balance and found to have a
mass of 43.6 g. The student decides to use
the water-displacement method to find the
volume. The initial volume reading is 25.5 mL
and, after the Al sample is added, the water
level has risen to 41.7 mL. Find the density of
the Al sample in g/cm3. (Remember: 1 mL =
1 cm3.) 2.69 g/mL
Volume= 41.7 mL - 25.5 mL= 16.2 mL
D= M / V= 43.6 g / 16.2 mL= 2.69 g/mL
Problem 5,6, & 7
30.0 g of each of the following acids are needed.
Find the volume of each that must be measured out
in a graduated cylinder.
5. hydrochloric acid (HCl), density = 1.164 g/mL
V= M / D= 30 g/ 1.164 g/mL= 25.77 mL
6. sulfuric acid (H2SO4), density = 1.834 g/mL
V= M / D= 30 g/ 1.834 g/mL= 16.36 mL
7. nitric acid (HNO3), density = 1.251 g/mL
V= M / D= 30 g/ 1.251 g/mL= 23.98 mL
PROBLEM 8, 9, 10
Promethium has a density of 7.26 grams/cm3
and Europium has a density of 5.24 g/cm3.
8. Which would have the greater mass,
12
cm3 of Promethium or 17 cm3 of Europium?
9 & 10 ENCIRCLE THE MASS OF BOTH
METALS.
Promethium= M= D x V= 7.26 x 12= 87.12 g
Europium= M= D x V= 5.24 x 17= 89.08 g
Europium has a bigger mass.
DENSITY OF WATER = 1 g/mL
SINK/FLOA
DENSITY
T
FORMULA
MASS
VOLUME
d= m/v
45 grams
30 mL
1.5 g/mL
sink
m= d x v
3.6 grams
8 mL
0.45 g/mL
float
v= m/d
100 grams
40 mL
2.5 g/mL
sink
d= m/v
84 grams
112 mL
0.75 g/mL
float
m= d x v
19.8 grams
20 mL
0.99 g/mL
float