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36
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How does the phenomenon of entanglement affect the behavior of electrons in molecular systems and how can we use quantum coherence to control the electronic properties of nanoscale materials?
answered
Feb 22
in
Quantum Chemistry
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votes
34
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What is the optimal temperature and concentration of nitric acid required for the successful preparation of 2,4-dinitrophenol from phenol via nitration? How does changing these parameters affect the yield and purity of the final product?
answered
Feb 21
in
Chemical synthesis
0
votes
33
views
What is the most suitable polymer-based biomaterial for developing a tissue-engineered scaffold for articular cartilage repair, and why?
answered
Feb 21
in
Polymer Chemistry
0
votes
35
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What is the mechanism by which sunscreen agents protect human skin against the harmful effects of ultraviolet radiation, and how can their photochemical properties be optimized to enhance their effectiveness?
answered
Feb 14
in
PhotoChemistry
0
votes
76
views
How to develop an efficient process for the large scale production of a specific specialty chemical with minimum wastage and maximum yield?
answered
Feb 12
in
Chemical engineering
0
votes
59
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How can the properties of polymer-based composites be enhanced for better performance in aerospace applications, such as increased strength and heat resistance?
answered
Feb 10
in
Polymer Chemistry
0
votes
39
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How can chemistry students overcome the challenges of insufficient funding for chemistry education in their institutions?
answered
Feb 5
in
Chemical education
0
votes
45
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Given the following half-reactions:Cu2+ (aq) + 2 e- -> Cu (s) E° = +0.34 VZn2+ (aq) + 2 e- -> Zn (s) E° = -0.76 VCalculate the equilibrium constant (K) for the reaction: Cu2+ (aq) + Zn (s) -> Zn2+ (aq) + Cu (s)
answered
Feb 4
in
ElectroChemistry
0
votes
100
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Calculate the standard enthalpy change (∆H°) and standard entropy change (∆S°) for the reaction between solid aluminum and gaseous oxygen to form solid aluminum oxide, given the following balanced chemical equation:4Al(s) + 3O2(g) → 2Al2O3(s) The standard enthalpies of formation of Al(s), O2(g), and Al2O3(s) are -394.4 kJ/mol, 0 kJ/mol, and -1675.7 kJ/mol, respectively. The standard entropy change for the reaction of O2(g) to form Al2O3(s) is -159.6 J/K·mol.
answered
Feb 3
in
Inorganic Chemistry
0
votes
71
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Calculate the enthalpy change for the dissolution of 10 g of sodium hydroxide in 100 g of water at a temperature of 25°C, given that the final temperature of the solution is 26.5°C and the specific heat capacity of the solution is 4.18 J g⁻¹ K⁻¹. (Assume that the heat released is absorbed by the solution and there is no heat lost to the surroundings.)
answered
Jan 23
in
ThermoChemistry
0
votes
96
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Calculate the bond order and bond length of the nitrogen-nitrogen bond in the N2 molecule using the Lewis structure and molecular orbital theory.
answered
Jan 23
in
Inorganic Chemistry
0
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115
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A chemistry student needs to calculate the equilibrium constant (Kc) for the reaction below at a certain temperature: N2(g) + 3H2(g) ⇌ 2NH3(g)Given the initial concentrations of N2, H2, and NH3 are 0.25 M, 0.1 M, and 0.1 M respectively, what is the value of Kc for this reaction at the given temperature?
answered
Jan 22
in
Chemical equilibrium
0
votes
50
views
What is construct validity in evaluating personality disorder theories?
answered
Jan 16
in
Psychology
0
votes
32
views
What is a limitation of the gate control theory?
answered
Jan 16
in
Psychology
0
votes
54
views
Please evaluate the cognitive load theory.
answered
Jan 16
in
Psychology
0
votes
46
views
How does the medical model of eating disorders contribute to their evaluation?
answered
Jan 16
in
Psychology
0
votes
57
views
What is the biopsychosocial theory of sexuality?
answered
Jan 15
in
Psychology
0
votes
73
views
What are the two divisions of the autonomic nervous system?
answered
Jan 14
in
Psychology
0
votes
62
views
What is Weber's law?
answered
Jan 14
in
Psychology
0
votes
41
views
What is an advantage of brightly colored fruits?
answered
Jan 6
in
Science
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