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Test Booklet
Subject: SC, Grade: HS
2008 Grade High School Chemistry
Student name:
Author: North Carolina
District: North Carolina Released Tests
Printed: Tuesday July 17, 2012
2008 Grade High School Chemistry
2+
1 How many protons and electrons are in a 64
29 Cu
SC:HS
5 How does an S2− ion differ from an electrically
ion?
neutral sulfur atom?
A
B
C
D
A
B
C
D
27 protons, 29 electrons
27 protons, 31 electrons
29 protons, 27 electrons
29 protons, 31 electrons
2 What is the name of the compound with the
chemical formula CrCl3 ?
A
B
C
D
chromium tetrachloride
chromium trichloride
chromium(II) chloride
chromium(III) chloride
mass number
atomic number
nuclear charge
number of electrons
6 A gas under a pressure of 74 mmHg and at a
temperature of 75◦ C occupies a 500.0-L container.
How many moles of gas are in the container?
A
B
C
D
1.7 moles
7.9 moles
13 moles
59 moles
3 If two oxygen atoms combine to make a molecule,
what type of bond will they form?
A
B
C
D
an ionic bond
a hydrogen bond
a double covalent bond
a metallic bond
4 Why did most of the alpha particles go straight
through the gold foil in Rutherford’s experiment?
A
B
C
D
Page 1
Most of an atom is empty space.
Alpha particles are positively charged.
Alpha particles move with high velocity.
The center of an atom is positively charged.
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2008 Grade High School Chemistry
SC:HS
7 A chemistry student is given 5 samples of a metal. The student measures and records the mass and the
volume of each sample and then graphs the data, as shown below.
What is the identity of the metal?
A
B
C
D
Page 2
aluminum
iron
nickel
lead
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2008 Grade High School Chemistry
SC:HS
8 Which orbital notation represents an s-block element in the third period?
A
B
C
D
9 What is the volume of 2.00 moles of nitrogen gas (
N2 ) at STP?
A
B
C
D
Page 3
11.2 L
28.0 L
44.8 L
56.0 L
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2008 Grade High School Chemistry
SC:HS
10 According to this balanced chemical equation, what volume of C2 H2 is required to form 40.0 L of CO2 ?
2C2 H2 (g) + 5O2 (g) → 2H2 O (g) + 4CO2 (g)
A
B
C
D
20.0 L
44.8 L
80.0 L
100 L
11 In an experiment, 2.62 g of iron react completely
with 1.50 g of sulfur. What is the empirical
formula for the compound produced?
A
B
C
D
FeS
FeS2
Fe2 S
Fe2 S3
12 What do the ions K+ , Ca2+ , and Cl− have in
common?
A They have the same number of protons.
B They will form covalent bonds with oxygen.
C They have the same electron configuration as
argon.
D They are larger than their corresponding atoms.
Page 4
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2008 Grade High School Chemistry
SC:HS
13 This graph represents a heating curve of a substance.
Which region on the graph represents the solid phase?
A
B
C
D
Page 5
I
II
III
IV
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2008 Grade High School Chemistry
14 When 42
19 K undergoes radioactive decay, the result
SC:HS
16 What type of chemical reaction is represented by
is two products, one of which is calcium-42. What
is the other product?
this balanced equation?
A 42 He
B 24 He
C 11 e
D 0−1 e
A
B
C
D
15 This graph is a potential energy diagram for a
chemical reaction.
S8 (s) + 8O2 (g) → 8SO2 (g)
synthesis
decomposition
single replacement
double replacement
17 Which chemical equation is balanced?
A
B
C
D
LiOH + CO2 → Li2 CO3 + H2 O
2LiOH + CO2 → Li2 CO3 + H2 O
LiOH + 3CO2 → 2Li2 CO3 + H2 O
4LiOH + CO2 → Li2 CO3 + 2H2 O
18 Neutralization occurs when 15.0 mL of KOH react
with 25.0 mL of HNO3 . If the molarity of HNO3
is 0.750 M , what is the molarity of the KOH?
Which energy measure will remain unchanged
with the addition of a catalyst?
A
B
C
D
Page 6
A
B
C
D
1.67 M
1.25 M
0.600 M
0.450 M
19 Which substance can act as either an acid or a base
II
according to the Brønsted-Lowry definition?
IV
A
B
C
D
V
VI
H3 O1+
NH1+
4
HOH
HCl
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2008 Grade High School Chemistry
SC:HS
20 What is the oxidation number of sulfur in BaSO4
?
A
B
C
D
-2
0
+1
+6
21 This diagram represents a phase diagram for a
substance.
At which point do solid, liquid, and gas phases
exist in equilibrium?
A
B
C
D
Page 7
1
2
3
4
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2008 Grade High School Chemistry
SC:HS
22 Using the solubility graph provided, a student performs an experiment to find the solubility of a substance.
The student finds the amount of substance needed to make a saturated solution in 100 g of water at different
temperatures. The student’s data are shown in the table below the graph.
What is the identity of the substance?
A
B
C
D
Page 8
Sodium Nitrate
Potassium Nitrate
Sodium Chloride
Potassium Chlorate
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2008 Grade High School Chemistry
SC:HS
23 What is the correct chemical formula for sodium
27 What is the correct name for the acid
sulfate?
whose chemical formula is H2 SO4 ?
A
B
C
D
A
B
C
D
NaSO4
Na2 SO4
Na (SO4 )2
Na2 (SO4 )2
24 Which compound contains both covalent and ionic
hydrosulfuric acid
hydrosulfurous acid
sulfurous acid
sulfuric acid
28 Which element is located in Group 2 (IIA) and
bonds?
Period 6 of the periodic table?
A
B
C
D
A
B
C
D
CaCO3
CO2
H2 O
NaCl
25 In a flexible container, 15.9 L of gas is under 589
◦
kPa of pressure at a temperature of 56.5 C. If the
pressure and temperature change to STP, what is
the new volume?
A
B
C
D
10.2 L
76.6 L
92.4 L
radium (Ra)
tungsten (W)
29 How many moles are in 325 g of (NH4 )2 Cr2 O7 ?
A
B
C
D
0.732 mole
0.776 mole
1.29 moles
1.37 moles
oxygen by mass?
hydrogen shown below?
1
2
1 H, 1 H,
Page 9
molybdenum (Mo)
30 Which compound contains the greatest percent of
112 L
26 What are the differences between these isotopes of
A
B
C
D
barium (Ba)
and
3
1H
the number of electrons and the atomic number
A
B
C
D
CO2
NO2
SO2
SiO2
the number of protons and the atomic number
the number of neutrons and the mass number
the number of electrons and protons
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2008 Grade High School Chemistry
SC:HS
31 This balanced equation represents a chemical reaction:
2KClO3 (s)
2KCl (s) + 3O2 (g)
How many moles of KCl are produced when 4.25 moles of KClO3 decompose?
A
B
C
D
1.06 moles
2.13 moles
4.25 moles
8.50 moles
32 Considering this balanced chemical equation, how
34 What can be said of a closed system when
many grams of HgO will be produced when 44 g
of Hg react with excess O2 ?
an exothermic reaction proceeds in an aqueous
solution?
2Hg (l) + O2 (g) → 2HgO (s)
A
B
C
D
28 g
44 g
reactants.
48 g
96 g
33 Which electron transmission in the hydrogen atom
will result in the emission of red light?
A
B
C
D
A There is a net energy loss.
B There is a net energy gain.
C Heat is transferred from the water to the
n = 2 to n = 3
n = 2 to n = 4
n = 3 to n = 2
n = 4 to n = 2
Page 10
D Heat is transferred from the reactants to the
water.
35 In which group are the particles arranged in order
of decreasing mass?
A
B
C
D
alpha, beta, neutron
alpha, neutron, beta
neutron, beta, alpha
neutron, alpha, beta
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2008 Grade High School Chemistry
SC:HS
36 Consider this incomplete chemical equation:
Ba + CuCl2 →
What are the products of this equation?
A
B
C
D
BaCl2 and CuCl2
BaCuCl2 and Ba
BaCl2 and Cu
BaCu and Cl2
37 What is the best reason for using iron filings
instead of an iron nail in a chemical reaction?
A to decrease the amount of catalyst during the
reaction
B to increase the molecular structure during the
reaction
C to decrease the rate of reaction
D to increase the surface area of the reaction
38 Which is a characteristic of a strong acid?
A
B
C
D
It has a pH greater than 7.
It completely ionizes in solution.
It contains many hydroxide ions.
It reacts only with a strong base.
Page 11
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2008 Grade High School Chemistry
SC:HS
39 Consider this balanced chemical equation:
Zn (s) + 2HCl (aq) → ZnCl2 (aq) + H2 (g)
Which is the oxidation half-reaction?
A
B
C
D
Zn → Zn2+ + 2e−
Zn + 2e− → Zn2+
2H+ → H2 + 2e−
2H+ + 2e− → H2
40 What is the net ionic equation for the reaction between Pb (NO3 )2 and HCl?
A
B
C
D
Pb2+ (aq) + 2Cl− (aq) → PbCl2 (s)
+
2NO−
(aq) → 2HNO3 (aq)
3 (aq) + 2H
Pb (NO3 )2 (aq) + 2HCl (aq) → PbCl2 (s) + 2HNO3 (aq)
−
+
Pb3+ (aq) + 2NO−
(aq) → PbCl2 (s) + 2H+ (aq) + 2NO−
3 (aq) + 2H 2Cl
3 (aq)
41 When combined, two gases have a pressure of 4.0
atm. If one gas has a pressure of 1.5 atm, what is
the pressure of the second gas?
A
B
C
D
1.5 atm
2.0 atm
2.5 atm
43 Which elements have the same number of
neutrons?
A
B
C
D
10
5 B,
and 12
6 C
55
25 Mn,
and 56
26 Fe
108
47 Ag,
and 112
48 Cd
197
79 Au,
and 201
80 Hg
5.5 atm
42 What compound has the chemical formula MgI2 ?
A
B
C
D
di-iodide magnesium
iodide(II) magnesium
magnesium iodide
magnesium(I) iodine(II)
Page 12
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2008 Grade High School Chemistry
44 This chart represents the melting point of several
substances.
SC:HS
46 This graph represents a phase diagram for a
substance.
What best explains the high melting point of the
salt?
A the strong electrostatic attraction between Na0
and Cl0
B the weak electrostatic attraction between Na0
and Cl0
C the weak electrostatic attraction between Na+
and Cl−
D the strong electrostatic attraction between Na+
and Cl−
What is the state of the substance at point I ?
45 Based on the VSEPR theory, what is the molecular
geometry of CO2 ?
A
B
C
D
linear
tetrahedral
A
B
C
D
gas
liquid
liquid and gas
solid and liquid
trigonal planar
trigonal pyramidal
47 Which one of these compounds is soluble in
water?
A
B
C
D
Page 13
aluminum sulfide
calcium carbonate
iron(III) hydroxide
potassium sulfate
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2008 Grade High School Chemistry
48 In which block does an element with the electron
2
14
10
1
SC:HS
51 Which orbital notation shows the lowest energy
configuration [Xe] 6s 4f 5d 6p belong?
arrangement of valence electrons for 1s2 2s2 2p3 ?
A
B
C
D
A 2s
s block
p block
d block
f block
B 2s
2p
C 2s
2p
D 2s
2p
49 Which statement is true for the reaction represented by this equation?
CH4 + 2CO2 → CO2 + 2H2 O
A 1 gram of CH4 is required to react with 2 grams
of O2 .
B 1 gram of CH4 is required to react with 4 grams
of O2 .
C 1 mole of CH4 is required to react with 2 moles
of O2 .
D 1 mole of CH4 is required to react with 4 moles
of O2 .
50 What is the percent by mass of N in Ca (CN)2 ?
A
B
C
D
15.21%
21.19%
30.42%
42.39%
Page 14
52 What is the molarity of 28.9 g of CaCl2 dissolved
in water to make
0.78 L of solution?
A
B
C
D
0.33 M
0.69 M
1.5 M
3.0 M
53 The half-life of phosphorus-32 is 14.3 days. How
much of a sample of phosphorus-32 will remain
after 57.2 days?
A
B
C
D
1
32
1
16
1
8
1
4
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2008 Grade High School Chemistry
SC:HS
54 To increase the temperature of 100.0 g of H2 O
from -50.0◦ C to -10.0◦ C, how much energy is
required?
A
B
C
D
1.67 × 104 J
8.20 × 103 J
8.08 × 103 J
1.95 × 103 J
55 What is the [ H+ ] of an HCl solution if the pH is
measured to be 6?
A
B
C
D
1 × 10−7 M
1 × 10−6 M
6 × 10−6 M
8 × 10−1 M
Page 15
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2008 Grade High School Chemistry
SC:HS
56 This balanced equation represents a chemical reaction.
2C4 H10 (g) + 13O2 (g) → 8CO2 (g) + 10H2 O (g)
What type of chemical reaction is represented by the equation?
A
B
C
D
combustion
decomposition
double replacement
single replacement
57 This balanced equation represents a chemical
reaction using palladium, Pd, as a catalyst.
CO2 (g) + H2 O (l)
H2 CO3 (l)
Without palladium the reaction is slow and
produces low concentrations of product. How does
the palladium increase the speed of the reaction?
A
B
C
D
The palladium reacts with the water.
The palladium lowers the activation energy.
The palladium purifies the carbon dioxide.
The palladium increases the reaction temperature.
58 Which pair of substances will likely undergo a
single replacement reaction?
A
B
C
D
Na and BaCl2
Zn and BaCl2
Ca and BaCl2
K and BaCl2
Page 16
59 What is the net ionic equation for the reaction
between aqueous solutions of LiBr and AgNO3 ?
A
B
C
D
Ag+ (aq) + Br− (aq) → AgBr (s)
Li+ (aq) + NO−
3 (aq) → LiNO3 (s)
Li+ (aq) + Br− (aq) → LiBr (s)
Ag+ (aq) + NO−
3 (aq) → AgNO3 (s)
60 A scientist hypothesizes that a colorless gas
produced during a chemical reaction is carbon
dioxide. Which observation would confirm this
hypothesis?
A The gas will react violently with water.
B A glowing splint placed in the gas will burn
brighter.
C Burning the gas in the presence of oxygen will
produce water.
D Bubbling the gas through lime water will make
the lime water cloudy.
STOP