Exam 10: Energy From Electron Transfer
Exam 1: Chemistry in Our World96 Questions
Exam 2: Atoms and Elements101 Questions
Exam 3: Chemicals and Compounds92 Questions
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Exam 6: Physical and Chemical Changes86 Questions
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Exam 10: Energy From Electron Transfer72 Questions
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Utilizing the half-cell potential information provided in Table 10.1, what can you say about the following two half reactions?
Br2(l) + 2e- 2 Br -(aq) Potential = 1.09 V
F2(g) + 2e- 2 F -(aq) Potential = 2.87 V
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(Multiple Choice)
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Correct Answer:
B
Static electricity is able to build up on the surface of your skin just by friction, particularly in dry climates or winter-time. Which statement best describes the potential energy and electrical properties of a static electricity discharge?
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(Multiple Choice)
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Correct Answer:
A
There are many fuel cell systems, but one of the more commonly studied is the Hydrogen/Oxygen fuel-cell, the two half reactions of which are shown below.
Reaction A 2 H2 + 4 OH- -----> 4 H2O + 4 e-
Reaction B O2 + 2 H2O + 4 e- -----> 4 OH -
Which reaction takes place at the cathode?
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(Multiple Choice)
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Correct Answer:
B
Which trait of nonmetals in their native state makes them more likely to serve as reducing agents?
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Combustion and cellular respiration are similar because they both ______ .
(Multiple Choice)
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For a spontaneous electrochemical reaction to occur, what criteria need to be met?
(Multiple Choice)
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Which of the following class of elements is most likely to serve as a reductant?
(Multiple Choice)
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Utilizing the half-cell potential information provided in Table 10.1, what can you say about the following two half reactions?
Mg+2(aq) + 2e- Mg(s) Potential = -2.38 V
Cu+2(aq) + 2e- Cu(s) Potential = +0.34 V
(Multiple Choice)
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For the following reaction involving the smelting of iron ore, the oxygen in the iron (III) oxide in the starting materials __________ .
2 Fe2O3(s) + 3 C(s) 4 Fe(l) + 3 CO2 (g)
(Multiple Choice)
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For the following reaction involving the smelting of iron ore, the iron (III) oxide in the starting materials __________ .
2 Fe2O3(s) + 3 C(s) 4 Fe(l) + 3 CO2 (g)
(Multiple Choice)
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For a compound that readily reacts with water to form anions you would expect _________ .
(Multiple Choice)
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In the tarnishing of silver, what is the most likely oxidant that causes the blackening of silver as it tarnishes?
(Multiple Choice)
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A positive cell potential means that the reaction __________ .
(Multiple Choice)
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In a p-type semiconductor, conceptually, how is the charge carried in the material?
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Which of the following is not directly tied to the amperage of a photovoltaic device?
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