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• CHEM101_MH_V4
• Topic 16: Nonmetallic Elements and Organic Chemistry
Started on Thursday, March 24, 2022, 11:12
... [Show More] AM
State Finished
Completed on Thursday, March 24, 2022, 11:48 AM
Time taken 36 mins 25 secs
Grade 110.40 out of 115.00 (96%)
Question 1
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What is ΔS° at 298 K for the following reaction?
Fe2O3(s) + 3CO(g) → 3CO2(g) + 2Fe(s)
Substance ΔG°f(kJ/mol) ΔH°f(kJ/mol)
Fe2O3(s) –741.0 –822.2
CO(g) –137.2 –110.5
CO2(g) –394.4 –393.5
Select one:
a. 12.7 J/K • mol
b. –12.7 J/K • mol
c. 527.9 J/K • mol
d. 157.2 J/K • mol
e. 4.6 J/K • mol
Question 2
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In a spontaneous exothermic process,
Select one:
a. system heats up while surroundings lose energy.
b. surroundings heat up, but there is no change in system’s energy.
c. system loses energy while surroundings heat up.
d. system heats up but there is not change in the energy of surroundings.
e. energy content of neither system nor surroundings changes.
Question 3
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Ozone (O3) in the atmosphere can react with nitric oxide (NO) as follows.
O3(g) + NO(g) → NO2(g) + O2(g). ΔH°rxn = –199 kJ/mol, ΔS°rxn = –4.1 J/K • mol
What is ΔG°rxn for this reaction at 25°C?
Select one:
a. 1020 kJ/mol
b. –1.22 × 103 kJ/mol
c. 2.00 × 103 kJ/mol
d. –1.42 × 103 kJ/mol
e. –198 kJ/mol
Question 4
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Which is not a redox reaction?
Select one:
a. Al(OH)4–(aq) + 4H+(aq) → Al3+(aq) + 4H2O(l)
b. C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(l)
c. Na6FeCl8(s) + 2Na(l) → 8NaCl(s) + Fe(s)
d. 2H2O2(aq) → 2H2O(l) + O2(g)
e. CO2(g) + H2(g) → CO(g) + H2O(g)
Question 5
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What is the name given to the experimental apparatus for generating electricity through the use of a spontaneous reaction?
Select one:
a. Electrolytic cell
b. Galvanic cell
c. Redox cell
d. Cathode
e. Anode
Question 6
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What product forms at the cathode during the electrolysis of molten lithium iodide?
Select one:
a. Li+(l)
b. Li(l)
c. I–(l)
d. I2(g)
e. I3–(l)
Question 7
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Which, if any, of the following metals would be capable of acting as a sacrificial anode when used with iron pipe?
Select one:
a.
b.
c.
d.
e.
Question 8
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Rubidium-87 decays by beta decay with a half-life of 4.9 × 1010 yr. How many 87Rb atoms are in a moon rock sample that has a rubidium decay rate of 3500 disintegrations per hour?
Select one:
a. 9.0 × 1016 atoms
b. 4.3 × 10–4 atoms
c. 2.2 × 1018 atoms
d. 2.5 × 1014 atoms
e. 1.7 × 1014 atoms
Question 9
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Calculate the energy released in joules when one mole of polonium-214 decays according to the following equation.
Particle Mass (amu)
Pb-210 209.98284
Po-214 213.99519
He-4 4.00260
(1 kg = 6.022 × 1026 amu;
NA = 6.022 × 1023 mol–1;
c = 2.99792458 × 108 m/s)
Select one:
a. 8.78 × 1014 J/mol
b. 7.2 × 1014 J/mol
c. 8.76 × 1011 J/mol
d. –9.75 × 10–3 J/mol
e. 1.46 × 10–9 J/mol
Question 10
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Uranium-235 decays by alpha emission. What isotope is also produced by this transformation?
Select one:
a. Pa-234
b. Th-237
c. Pu-237
d. Th-231
e. Pu-239
Question 11
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In the following reaction, identify X.
Select one:
a. 7β
b. 3α
c. 4n
d.
e. 15p
Question 12
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In the complex ion [Co(en)2Br2]+, what is the oxidation number of Co?
Select one:
a. +1
b. +2
c. +3
d. –2
e. –1
Question 13
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Which of the following ligands is most likely to form a high-spin octahedral complex with cobalt(II)?
Select one:
a. CN–
b. en (ethylenediamine)
c. NH3
d. CO
e. I–
Question 14
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Which of these atoms is the most electronegative?
Select one:
a. Si
b. Cl
c. P
d. F
e. C
Question 15
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Which of these elements is most likely to exhibit an expanded octet in its compounds?
Select one:
a. C
b. O
c. N
d. S
e. Na
Question 16
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Which of these pairs consists of isoelectronic species?
Select one:
a. Zn2+ and Cu2+
b. Cl– and S
c. Na+ and K+
d. Mn2+ and Ar
e. K+ and Cl–
Question 17
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What products are formed from the reaction of Cl2(g) with I–(aq)?
Select one:
a. ICl
b. ICl2
c. ICl3
d. I2 and Cl–
e. I and Cl2–
Question 18
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Which oxide is an amphoteric oxide?
Select one:
a. Na2O
b. Al2O3
c. BaO
d. SiO2
e. More that one of these oxides are amphoteric.
Question 19
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The strongest elemental oxidizing agents are found in the _________ _________ region of the periodic table while the strongest reducing agents are found in the ________ ________ region of the periodic table.
Select one:
a. upper left, lower right
b. upper right, lower left
c. lower left, upper right
d. lower right, upper left
e. transition element, main group
Question 20
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Which would exhibit characteristics of both a metal and a nonmetal?
Select one:
a. Si
b. Ge
c. Sb
d. Po
e. All of the above exhibit characteristics of both a metal and a nonmetal.
Question 21
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What group of the periodic table is the element with the electron configuration [Ar]4s23d104p2?
Select one:
a. 4A
b. 3A
c. 5A
d. 2A
e. 6A
Question 22
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Which is NOT true concerning sulfur?
Select one:
a. Sulfur reacts with carbon to form a flammable liquid.
b. Sulfur reacts with fluorine to form an inert compound.
c. Sulfur reacts with oxygen to form a strongly acid oxide.
d. Sulfur reacts with hydrogen to form a pungent, foul-smelling gas.
e. In its solid elemental form, sulfur exists as an eight-membered ring.
Question 23
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Which reaction represents the disproportionation of hydrogen peroxide?
Select one:
a.
b.
c.
d.
e.
Question 24
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What name is given to a compound containing a –CHO group?
Select one:
a. Aldehyde
b. Ketone
c. Alcohol
d. Carboxylic acid
e. Ester
Question 25
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Which one of these materials is a copolymer?
Select one:
a. Polystyrene-polybutadiene
b. Polyvinyl chloride
c. Polypropylene
d. Poly-cis-isoprene
e. Polyethylene [Show Less]