Question 1
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According to which scientific law does the entropy of the universe increase in spontaneous
processes and
... [Show More] remain unchanged in equilibrium processes?
Select one:
A. 1st universal law
B. 1st law of entropy
C. 2nd law of thermodynamics
D. 3rd law of thermodynamics
E. 1st law of thermodynamics
Straighterline CHEM101 General Chemistry I Graded Exam 4 (New Version June 2024)
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CHEM101_MH_V6 | Topic 18: Organic Chemistry
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GradeQuestion 3
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The heat of vaporization of 1-pentanol is 55.5 kJ/mol, and its entropy of vaporization is .
What is the approximate boiling point of 1-pentanol?
Select one:
A. 0°C
B. 100°C
C. 375°C
D. 25°C
Question 2
Correct
5.00 points out
of 5.00
What is ΔS° for the following reaction?
4Cr(s) + 3O2(g) → 2Cr2O3(s)
Substance
S° (J/K • mol)
Cr(s)
23.77
O2(g)
205.138
Cr2O3(s)
80.65
Select one:
A. –549.19 J/K • mol
B. +66.22 J/K • mol
C. +148.26 J/K • mol
D. +871.80 J/K • mol
E. –148.26 J/K • molThe temperature at which the following process reaches equilibrium at 1.0 atm is the
normal melting point for phosphoric acid.
H3PO4(s) H3PO4(l)
Use the following thermodynamic data at 298 K to estimate this temperature.
A. 315 K
B. 3170 K
C. 347 K
D. 305 K
E. 286 K
Question 5
Correct
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Which of the following results in a decrease in the entropy of the system?
Select one:
A. NH3(l), –34.5°C → NH3(g), –34.5°C
B. 2H2O2(g) → 2H2O(g) + O2(g)
C. N2(g), 25°C → N2(aq), 25°C
D. H2O(s), 0°C → H2O(l), 0°C
E. O2(g), 300 K → O2(g), 400 K
Substance: H3PO4(s) H3PO4(l)
ΔH°f (kJ/mol): –1284.4 –1271.7
ΔG°f (kJ/mol): –1124.3 –1123.6
S°(J/K • mol):
Select one:
110.5 150.8
Question 4
Correct
5.00 points out
of 5.00Question 7
Correct
5.00 points out
of 5.00
Identify the missing species in the following nuclear transmutation.
U-238 + ? → 1 neutron + Fm-249
Select one:
A. Al
B. Al
C. Li
D. O
E. O
Question 6
Correct
5.00 points out
of 5.00
Consider the figure below which shows ΔG° for a chemical process plotted against
absolute temperature. From this plot, it is reasonable to conclude that:
Select one:
A.
B.
C.
D.
E. None of these choices is correct.Question 9
Incorrect
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What other particle is emitted when a neutron is converted to a proton in a nucleus?
Select one:
A. Beta particle
B. Alpha particle
C. Positron
D. Gamma particle
E. None of the answers is correct.
Question 8
Incorrect
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A mass of 6.02 × 1026 amu is equivalent to
Select one:
A. 1 g.
B. 1 kg.
C. 1 mol.
D. 1 mg.
E. 1 J.Question 11
Correct
5.00 points out
of 5.00
Which of the following is used to image the liver?
Select one:
A. 131I
B. 123I
C. 99Tc
D. 24Na
E. 18O
Question 10
Incorrect
0.00 points out
of 5.00
In the following diagrams, A represents a radioactive isotope that decays into a new
isotope, X. Each circle represents 1 mmol of atoms.
t = 0:
t = 25.0 s:
Over the first 25.0 s, what is the disintegration rate of A?
Select one:
A. 7.23 × 1019 disintegrations per second
B. 1.38 × 10–20 disintegrations per second
C. 3.00 disintegrations per second
D. 0.120 disintegrations per second
E. 1.81 × 1021 disintegrations per secondQuestion 13
Correct
5.00 points out
of 5.00
How many 4d electrons does a ground-state Cd2+ ion have?
Select one:
A. 7
B. 2
C. 9
D. 10
E. 8
Question 14
Correct
5.00 points out
of 5.00
Which of the following ligands has two different types of donor atoms?
Select one:
A. NH4+
B. H2O
C. NH3
D. NO2–
E. ethylenediamine
Question 12
Correct
5.00 points out
of 5.00
What is the energy equivalent of 1 amu?
(c = 2.99792458 × 108 m/s)
Select one:
A. 6.6 × 109 J
B. 5.4 × 1043 J
C. 1.5 × 10–10 J
D. 5.0 × 10–19 JQuestion 16
Correct
5.00 points out
of 5.00
In the complex ion [Fe(CN)6]4–, what is the oxidation number of Fe?
Select one:
A. +1
B. –4
C. +3
D. +6
E. +2
Question 17
Correct
5.00 points out
of 5.00
What is the coordination number of cobalt in the complex ion [Co(en)Cl4]–?
(en = ethylenediamine)
Select one:
A. 6
B. 2
C. 8
D. 1
E. 4
Question 15
Correct
5.00 points out
of 5.00
Which of these square planar complex ions can have cis-trans isomers?
Select one:
A. [Pt(NH3)Cl3]–
B. [Pt(NH3)4]2+
C. [Ni(NH3)4]2+
D. [Ni(NH3)3Cl]+
E. [Pt(NH3)2Cl2]Question 19
Correct
5.00 points out
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What is the systematic name for Cr(CO)3(NH3)3?
Select one:
A. triamminechromium carbonate
B. chromiumtriaminotricarbonyl
C. triamminetricarbonylchromate(0)
D. tris(amino)tris(carbonyl)chromium
E. triamminetricarbonylchromium(0)
Question 20
Correct
5.00 points out
of 5.00
Silicon carbide is an important industrial chemical. Which of the following statements
about silicon carbide is true?
Select one:
A. It is the hardest known substance.
B. It is used for cutting, grinding, and polishing metals and glasses.
C. It is used in the preparation of glass which can be used at high temperature.
D. It is a naturally occurring mineral source of silicon.
E. It will react with water to form acetylene.
Question 18
Correct
5.00 points out
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In the complex ion [Co(en)2Br2]+, what is the oxidation number of Co?
Select one:
A. +3
B. –1
C. +2
D. –2
E. +1Question 22
Incorrect
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of 5.00
What is the formal charge on the iodine atom in the iodate ion, IO3–?
Select one:
A. –1
B. +2
C. +1
D. –2
E. 0
Question 23
Correct
5.00 points out
of 5.00
What is the formal charge on sulfur in the best Lewis structure for the SCN–?
Select one:
A. –2
B. 0
C. –1
D. +1
E. +2
Question 21
Correct
5.00 points out
of 5.00
Which of these compounds is most likely to be covalent?
Select one:
A. NF3
B. CaO
C. Sr(NO3)2
D. LiF
E. CsOHQuestion 25
Correct
5.00 points out
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What is the general electron configuration for atoms of all elements in Group 5A?
Select one:
A. ns2np3
B. ns2np4
C. ns2np5
D. ns2np1
E. ns2np6
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Question 24
Correct
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In their elemental forms, the halogens are
Select one:
A. strong bases.
B. strong reducing agents.
C. strong oxidizing agents.
D. amphoteric.
E. strong acids.© 2023 StraighterLine. All rights reserved [Show Less]