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VIRGINIA STANDARDS OF LEARNING
Spring 2007 Released Test
END OF COURSE
CHEMISTRY
Form S0117, CORE 1
Property of the Virginia Department of Education
©2007 by the Commonwealth of Virginia, Department of Education, P.O. Box 2120, Richmond, Virginia 23218-2120.
All rights reserved. Except as permitted by law, this material may not be reproduced or used in any form or by any means,
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ISD6736
Chemistry
Directions
Read each question carefully and choose the best answer. Then mark the space on your answer
document for the answer you have chosen.
SAMPLE
Which of the following is a balanced equation?
A
H2 + Br2 → 2HBr
B
H2 + Br2 → HBr
C
H2 + 2Br2 → 2HBr
D
2H2 + Br2 → HBr
3
1
15
10
5
What is the volume of the liquid in the graduated cylinder?
A
B
C
D
2
13.00
13.50
14.00
14.50
mL
mL
mL
mL
Atoms of the noble gases are generally inert because —
F
G
H
J
they are too large to react
they are not charged
they are neutral atoms
their outer electron levels are filled
4
3
Element
Mass in Grams for a Mole of Atoms
Ca
H
O
40
1
16
What is the mass of a mole of Ca(OH)2 ?
A
B
C
D
4
57 grams
58 grams
74 grams
114 grams
Which of these represents a synthesis reaction?
→ AgCl + HNO3
F
AgNO3 + HCl
G
Zn + 2HCl → ZnCl2 + H2
H
N2 + 3H2 → 2NH3
J
2KClO3 → 2KCl + 3O2
5
5
Sulfur is represented by the following Lewis dot structure:
S
Which of the elements has the same Lewis structure?
A
B
C
D
6
Chlorine
Magnesium
Oxygen
Phosphorus
A mixture of gases with a pressure of 800.0 mm Hg contains 60% nitrogen
and 40% oxygen by volume. What is the partial pressure of oxygen in this
mixture?
F
G
H
J
140.0
320.0
373.0
480.0
mm
mm
mm
mm
Hg
Hg
Hg
Hg
6
7
2C 4H10 + 13O2 → 8CO2 + 10H2O
The equation shows the combustion of butane (C 4H10 ). How many moles of
water can be produced by 12.5 moles of C 4H10 with excess oxygen?
A
B
C
D
8
9
2.50 mol
62.5 mol
125 mol
202 mol
The formula for magnesium chloride is —
F
MgCl2
G
MnCl
H
Mg2 Cl3
J
MnCl2
What are the numbers of protons, neutrons, and electrons in an isotope of
titanium with a mass number of 50?
A
B
C
D
22
28
50
22
p,
p,
p,
p,
22
22
22
28
n,
n,
n,
n,
28
22
50
22
e
e
e
e
7
10
Molar Heat of Vaporization
H2O
40.7 kJ/mole
NH3
23.4 kJ/mole
Water and ammonia have different molar heats of vaporization. The best
interpretation, at the molecular level, is that water molecules —
F
G
H
J
11
have stronger intermolecular attractions
occupy larger molecular volumes
set up stronger repulsive nuclear forces
collide more frequently with each other
Which of these statements describes what happens to the molecules of a solid
as the temperature is lowered to absolute zero ( − 273°C)?
A
B
C
D
They begin to take up more space.
They become farther apart.
Their kinetic energy gradually increases to a maximum.
Their motion gradually decreases and eventually stops.
8
12
A sample of iron has a volume of 10.0 mL. The density of iron is 7.87 g/mL.
Which is the correct expression to calculate the mass of the sample using
dimensional analysis?
F
G
H
J
10.0 mL ×
7.87 g
10.0 mL ×
1g
10.0 mL ×
10.0 mL ×
1mL
7.87 mL
1mL
7.87 g
7.87 mL
1g
13
2N2 + 5O2 → 2N2O5
What mass of nitrogen is required to react with 16 grams of oxygen?
A
B
C
D
2.8 g
5.6 g
14 g
56 g
9
14
Hydrogen chloride can be formed from hydrogen and chlorine as shown in the
reaction.
H2 + Cl2 → 2HCl + heat
Chlorine and fluorine are located in the same group in the periodic table. If
the reaction were performed with fluorine instead of chlorine, how many
moles of H2 would be required to balance the equation?
F
G
H
J
15
( )
The correct name for Mg3 PO4
A
B
C
D
16
1
2
4
8
2
is —
magnesium phosphite
trimagnesium phosphate
magnesium(III) phosphate
magnesium phosphate
How many protons are in an atom represented by
F
G
H
J
88
132
220
308
10
220
Ra?
88
17
Student Measurements of Temperature
Student 1
Student 2
Student 3
Student 4
Reading
1 (°C)
Reading
2 (°C)
Reading
3 (°C)
78.6
82.4
80.0
80.1
78.5
80.0
78.9
79.9
78.7
81.4
81.8
80.0
Four students each took three temperature readings of a sample of water.
The actual temperature of the sample was 80.0ºC. Which student’s
measurements were both accurate and precise?
A
B
C
D
18
Student
Student
Student
Student
1
2
3
4
According to the kinetic-molecular theory of gases, molecules of an ideal
gas —
F
G
H
J
travel in curved lines of motion
undergo elastic collisions
are separated by small distances
have strong forces between them
11
19
What is the molar mass of beryllium oxide (BeO)?
A
B
C
D
20
g/mol
g/mol
g/mol
g/mol
Catalytic converters made of palladium (Pd) reduce automobile pollution by
catalyzing the reaction between unburned hydrocarbons and oxygen. How
does Pd increase the rate of this reaction?
F
G
H
J
21
12
13
24
25
By
By
By
By
cooling the reactants
splitting the oxygen atoms
giving the hydrocarbons a negative charge
decreasing the activation energy
( )
A chloride ion Cl − has the same number of electrons as a neutral atom of —
A
B
C
D
fluorine
sulfur
argon
bromine
12
22
Which of these is the proper method for using a thermometer to measure the
temperature of liquid in a beaker?
F
G
H
J
13
23
O
F
3.5
4.0
S
Cl
2.5
?
Se
Br
2.4
2.8
Which of the following is most likely the electronegativity value for chlorine?
A
B
C
D
24
2.3
2.7
3.0
4.2
Which compound has a covalent bond?
F
CaI2
G
KBr
H
NaCl
J
NO
14
25
C 3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O(g)
If 5.0 moles of C 3H8 react, how many molecules of water are formed?
A
B
C
D
26
4.8 × 1024
1.2 × 1025
2.4 × 1025
Which of these best describes sublimation?
F
G
H
J
27
3.0 × 1024
A
A
A
A
solid changing to a liquid phase
solid changing to a gaseous phase
gas filling the space in its container
liquid taking the shape of its container
If the difference in electronegativity between atoms of different non-metals is
small, the atoms of the two non-metals will most likely —
A
B
C
D
form
form
form
form
an ionic bond
a hydrogen bond
a covalent bond
a metallic bond
15
28
The role of a catalyst is to affect —
F
G
H
J
29
Which of these best describes the difference between the formulas for
nitrogen monoxide and nitrogen dioxide?
A
B
C
D
30
electronegativity
heat content
activation energy
ionization energy
Nitrogen
Nitrogen
Nitrogen
Nitrogen
monoxide has one more atom of nitrogen.
dioxide has one fewer atom of oxygen.
monoxide has one fewer atom of oxygen.
dioxide has one more atom of nitrogen.
(
)
Sulfuric acid H2SO4 is spilled on a laboratory bench. Which chemical would
be useful for neutralizing the acid?
F
G
H
J
(
)
Potassium nitrate (KNO )
Silver iodide ( AgI)
Sodium bicarbonate (NaHCO )
Aluminum chloride AlCl3
3
3
16
31
When compared to sulfur-32, sulfur-34 has more —
A
B
C
D
protons
neutrons
energy levels
bonding configurations
32
Percent Alcohol vs. Density
50
1
2
Alcohol
(%)
40
3
30
4
20
5
10
0
.90 .91 .92 .93 .94 .95 .96 .97 .98 .99 1.0
Density
(g/mL)
The graph shows five data points collected in an investigation of the
relationship between the concentration of alcohol dissolved in water and its
density. The relationship was expected to be linear. Which of the data points
most likely resulted from an error in procedure?
F
G
H
J
1
2
4
5
17
33
What is the chemical name for the compound P3N5?
A
B
C
D
34
Triphosphorus nitride
Phosphorus(III) nitride
Triphosphorus pentanitride
Pentaphosphorus trinitride
In HNO3 , the oxidation state of hydrogen is + 1 and the oxidation state of
oxygen is − 2 . Therefore, the oxidation state of nitrogen is —
F
G
H
J
–1
+3
+4
+5
18
35
Phase Diagram
4
Pressure
2
1
3
Temperature
The graph shows the phase diagram of a substance. At which point on the
diagram do the solid, liquid, and gas phases coexist simultaneously?
A
B
C
D
1
2
3
4
19
36
The partial pressures of the gases that comprise air are shown in the table.
Partial Pressures
of Gases in Air
Gas
Partial Pressure
(mm Hg)
Ar
CO2
N2
O2
Others
7.10
?
593.44
159.20
0.02
If the total atmospheric pressure is 760.00 mm Hg, what is the partial
pressure of CO2 ?
F
G
H
J
37
0.03 mm Hg
0.24 mm Hg
7.36 mm Hg
759.76 mm Hg
Which is the safest practice when heating the contents of a test tube over a
flame?
A
B
C
D
Wearing long hair down
Having safety goggles within reach
Pointing the test tube away from people
Keeping the test tube securely stoppered
20
38
__Al + __H2SO4 → __Al2 (SO4 )3 + __H2
When the equation is correctly balanced, the coefficient of H2SO4 is —
F
G
H
J
Volume
A
Volume
Which graph shows the relationship between temperature and volume as
described in Charles’ Law?
C
0
0
B
Temperature
Pressure
Temperature
Pressure
39
1
2
3
4
D
0
0
Temperature
Temperature
21
40
Place the following models about the structure of the atom in the order that
they were developed:
1. Planetary model
2. Quantum mechanical model
3. Solid sphere model
F
G
H
J
41
1,
1,
2,
3,
3,
2,
3,
1,
2
3
1
2
The boiling point of ethanol is 78.3°C. The boiling point of ethanol on the
Kelvin scale is approximately —
A
B
C
D
26 K
178 K
351 K
451 K
42
CO2 + H2O → H2CO3
The reaction is which type of chemical reaction?
F
G
H
J
Single replacement
Double replacement
Synthesis
Decomposition
22
43
What does pH measure?
A
B
C
D
Hydrogen ion concentration
Hydroxide ion concentration
Acid density
Base density
44
4P + 5O2 → 2P2O x
The subscript of oxygen in the product should be —
F
G
H
J
45
2
5
10
20
The proper scientific notation for 565,000,000,000 is —
A
B
C
D
.565 × 1012
5.65 × 1011
56.5 × 1010
565 × 109
23
46
What are shared in covalent bonds?
F
G
H
J
47
Cations
Protons
Electrons
Anions
(
A 0.67 L solution of ammonium sulfate, NH4
) SO , contains 0.81 mole of the
2
4
solute. What is the approximate molarity of the solution?
A
B
C
D
48
0.54 M
0.83 M
1.2 M
1.5 M
Which of these is the percent of error in evaluating the molecular mass of a
compound if the experimental value was 105.2 amu and the known value was
107.5 amu?
F
G
H
J
1.0%
2.1%
3.3%
4.2%
24
49
What is the correct formula for aluminum chloride?
A
AlCl3
B
Al3 Cl
C
Al2 Cl3
D
AlCl
50
2NO2 (g) N2O4 (g)
NO2 and N2O4 undergo the reaction shown. When a sealed container of NO2
reaches chemical equilibrium, which must be true?
F
G
H
J
No N2 O 4 is present.
No chemical reactions are occurring.
The rates of the forward and reverse reactions are equal.
The maximum number of molecules has been reached.
25
Answer Key-EOC015-S0117
Test Sequence
Number
Correct Answer
1
B
2
J
3
C
Reporting
Category
001
002
004
4
H
003
5
6
7
C
G
B
003
005
004
8
9
10
11
12
13
F
D
F
D
F
B
003
002
005
005
001
004
14
F
003
15
16
17
18
19
D
F
D
G
D
003
002
001
005
004
20
21
22
23
J
C
J
C
003
002
001
002
24
25
26
J
C
G
003
004
005
27
C
003
28
H
003
29
30
31
32
C
J
B
G
003
001
002
001
33
34
35
36
37
C
J
A
G
C
003
002
005
005
001
38
39
40
41
H
A
J
C
003
005
002
001
42
43
H
A
003
004
44
45
G
B
003
001
46
47
48
H
C
G
003
004
001
49
50
A
H
003
004
Reporting Category Description
Scientific Investigation
Atomic Structure and Periodic Relationships
Molar Relationships
Nomenclature, Chemical Formulas, and
Reactions
Nomenclature, Chemical Formulas, and
Reactions
Phases of Matter and Kinetic Molecular Theory
Molar Relationships
Nomenclature, Chemical Formulas, and
Reactions
Atomic Structure and Periodic Relationships
Phases of Matter and Kinetic Molecular Theory
Phases of Matter and Kinetic Molecular Theory
Scientific Investigation
Molar Relationships
Nomenclature, Chemical Formulas, and
Reactions
Nomenclature, Chemical Formulas, and
Reactions
Atomic Structure and Periodic Relationships
Scientific Investigation
Phases of Matter and Kinetic Molecular Theory
Molar Relationships
Nomenclature, Chemical Formulas, and
Reactions
Atomic Structure and Periodic Relationships
Scientific Investigation
Atomic Structure and Periodic Relationships
Nomenclature, Chemical Formulas, and
Reactions
Molar Relationships
Phases of Matter and Kinetic Molecular Theory
Nomenclature, Chemical Formulas, and
Reactions
Nomenclature, Chemical Formulas, and
Reactions
Nomenclature, Chemical Formulas, and
Reactions
Scientific Investigation
Atomic Structure and Periodic Relationships
Scientific Investigation
Nomenclature, Chemical Formulas, and
Reactions
Atomic Structure and Periodic Relationships
Phases of Matter and Kinetic Molecular Theory
Phases of Matter and Kinetic Molecular Theory
Scientific Investigation
Nomenclature, Chemical Formulas, and
Reactions
Phases of Matter and Kinetic Molecular Theory
Atomic Structure and Periodic Relationships
Scientific Investigation
Nomenclature, Chemical Formulas, and
Reactions
Molar Relationships
Nomenclature, Chemical Formulas, and
Reactions
Scientific Investigation
Nomenclature, Chemical Formulas, and
Reactions
Molar Relationships
Scientific Investigation
Nomenclature, Chemical Formulas, and
Reactions
Molar Relationships
Chemistry, Core 1
If you get this
many items
correct:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Then your
converted scale
score is:
000
188
221
242
257
269
279
289
297
304
311
318
324
329
335
340
345
350
355
360
364
369
373
378
382
387
391
395
400
404
409
413
418
423
428
433
438
443
449
455
461
468
475
483
491
502
513
528
548
581
600