EOC Chemistry Sample Items Goal 2
North Carolina Testing Program
1.
A violet reaction occurs when sodium
is placed in water. Which element
would produce a similar reaction with
water?
2.
An element with the electron
configuration [Ne] 3s23 p2 would be
expected to react similarly to which
of the following elements?
A
Mg
A
aluminum
B
S
B
carbon
C
K
C
phosphorus
D
Cr
D
neon
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Published October 2004. May reproduce for instructional and
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EOC Chemistry Sample Items Goal 2
North Carolina Testing Program
Use the following information to answer
Questions 3 through 5.
4.
A student placed a strip of copper in a
container of iodine vapor. A chemical
reaction occurred that produced a white
powder on the strip of copper. The following
data were collected:
Experiment Results
Original mass
of copper strip
28.96 g
Mass of copper
and white powder
30.38 g
Final mass of
copper strip
28.60 g
3.
How many moles of copper were in the
original strip?
A
0.4557 mole
B
2.194 moles
C
1840. moles
D
6.020 ¥ 1023 moles
How many moles of sodium carbonate
are in 500. mL of a 0.300-M solution of
sodium carbonate?
A
0.150 mole
B
0.840 mole
C
3.18 moles
D
5.
150. moles
The product contains copper(II) ions;
which of the following is an acceptable
balanced equation for this reaction?
A
Cu 2 (s) + I2 (g) Æ 2CuI (s)
B
Cu (s) + I (g) Æ CuI (s)
C
Cu (s) + I2 (g) Æ CuI2 (s)
D
4Cu (s) + I2 (g) Æ 2Cu 2I (s)
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Published October 2004. May reproduce for instructional and
educational purposes only; not for personal or financial gain.
EOC Chemistry Sample Items Goal 2
North Carolina Testing Program
6.
7.
Butane (C4H10 ) is used as the fuel in
many portable lighters. When butane
is completely combusted in oxygen,
what is the coefficient for the water
produced in the properly balanced
equation that represents the reaction?
A
10
B
8
C
6
D
4
Consider the following balanced
equation:
2KClO3 (s) Æ 2KCl (s) + 3O2 ( g)
How many moles of O2 will be
obtained by decomposing
3.50 moles of KClO3 ?
A
5.25 moles
B
3.00 moles
C
2.30 moles
D
0.530 moles
8.
Consider the following balanced
equation:
5CO + I2O5 Æ 5CO2 + I2
Which substance is the oxidizing
agent?
A
CO
B
I2O5
C
CO2
D
I2
End of Goal 2 Sample Items
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Answers to EOC Chemistry Sample Items
Goal 2
1.
Objective 2.01
Analyze periodic nature of trends in chemical properties and examine the use of the
Periodic Table to predict properties of elements.
Thinking Skill: Organizing
Correct Answer:
C
2.
Objective 2.01
Analyze periodic nature of trends in chemical properties and examine the use of the
Periodic Table to predict properties of elements.
Thinking Skill: Analyzing
Correct Answer:
B
3.
Objective 2.02
Analyze the mole concept and Avogadro’s number and use them to calculate.
Thinking Skill: Applying
Correct Answer:
A
4.
Objective 2.02
Analyze the mole concept and Avogadro’s number and use them to calculate.
Thinking Skill: Analyzing
Correct Answer:
A
5.
Objective 2.03
Identify various types of chemical equations and balance those equations.
Thinking Skill: Generating
Correct Answer:
C
6.
Objective 2.03
Identify various types of chemical equations and balance those equations.
Thinking Skill: Integrating
Correct Answer:
A
7.
Objective 2.04
Calculate quantitative relationships in chemical reactions (stoichiometry).
Thinking Skill: Applying
Correct Answer:
A
8.
Objective 2.06
Track the transfer of electrons in oxidation/reduction reactions and assign oxidation
numbers.
Thinking Skill: Analyzing
Correct Answer:
B
North Carolina Testing Program
Published October 2004. May reproduce for instructional and educational
purposes only; not for personal or financial gain.