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How does the particle size of a gold nanoparticle affect its photochemical properties such as absorbance, emission, and quantum yield under different light sources and intensities?
answered
5 days
ago
in
PhotoChemistry
0
votes
24
views
How does the particle size and shape of nanomaterials affect their catalytic activity in chemical reactions, specifically in the oxidation of organic molecules?
answered
5 days
ago
in
Materials Chemistry
0
votes
18
views
What is the optimal temperature and reaction time for the preparation of benzocaine from p-aminobenzoic acid and ethanol in order to achieve the highest yield?
answered
5 days
ago
in
Chemical synthesis
0
votes
29
views
What is the optimal reaction temperature and catalyst concentration for the synthesis of polyacrylonitrile from acrylonitrile monomer using ammonium persulfate as the initiator?
answered
5 days
ago
in
Chemical synthesis
0
votes
34
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What is the balanced chemical equation for the synthesis of nylon-6,6 from adipic acid and hexamethylenediamine, and what is the theoretical yield of nylon-6,6 that can be produced from a given amount of starting materials?
answered
Feb 17
in
Chemical synthesis
0
votes
33
views
How does the activation of protein kinase A by cAMP (cyclic AMP) impact the signal transduction pathway?
answered
Feb 17
in
BioChemistry
0
votes
30
views
How does the existing drug Sildenafil (Viagra) work on a molecular level to treat erectile dysfunction?
answered
Feb 14
in
Medicinal Chemistry
0
votes
31
views
How can we predict the crystal structures of inorganic solids using different computational methods and experimental techniques?
answered
Feb 14
in
Inorganic Chemistry
0
votes
35
views
What is the difference between IR spectroscopy and Raman spectroscopy in terms of the vibrational modes of a molecule? Provide specific examples of when one technique may be more suitable than the other.
answered
Feb 13
in
Physical Chemistry
0
votes
35
views
How can the synthesis and characterization of new materials be optimized to improve drug delivery efficacy and reduce toxicity?
answered
Feb 11
in
Materials Chemistry
0
votes
39
views
How can the principles of quantum mechanics be used in the development of algorithms and hardware for quantum computing, and what potential advantages does this technology offer over classical computing for solving chemical problems?
answered
Feb 10
in
Quantum Chemistry
0
votes
32
views
How can the electrical conductivity of polymer-based electronic materials be optimized for use in high-performance electronics?
answered
Feb 7
in
Polymer Chemistry
0
votes
32
views
How can practical applications of chemistry be incorporated into the curriculum to improve the understanding and relevance of the subject for students?
answered
Feb 5
in
Chemical education
0
votes
36
views
How can chemical educators simplify complex chemical concepts without losing their scientific accuracy?
answered
Feb 4
in
Chemical education
0
votes
52
views
Calculate the resistance of a electrochemical cell at 25°C if the standard reduction potential of the anode is -1.36 V and the standard reduction potential of the cathode is +0.40 V. The solution contains 0.1 M CuSO4 and 0.01 M ZnSO4. The distance between the two electrodes is 5 cm and the cross-sectional area of each electrode is 2.5 cm².
answered
Feb 3
in
ElectroChemistry
0
votes
102
views
What is the concentration of a hydrochloric acid (HCl) solution in moles per liter (M) if 25 mL of a 0.1 M sodium hydroxide (NaOH) solution is required to neutralize 50 mL of the HCl solution?
answered
Jan 30
in
Analytical Chemistry
0
votes
73
views
Calculate the enthalpy of polymerization for the reaction of ethylene (C2H4) to polyethylene (C2H4)n, given that the enthalpy of combustion for ethylene is -1411 kJ/mol and the number of moles of ethylene used in the reaction is 4.5 mol. Assume that the reaction is exothermic and that the enthalpy change is constant over the extent of the reaction.
answered
Jan 23
in
ThermoChemistry
0
votes
90
views
A chemistry student wants to calculate the pH of a solution formed by mixing 100 mL of 0.1 M HCl with 200 mL of 0.05 M NaOH. What is the pH of the resulting solution?
answered
Jan 22
in
Inorganic Chemistry
0
votes
39
views
When evaluating a theory, what is the criterion for coherence?
answered
Jan 20
in
Psychology
0
votes
38
views
What is the main criticism of the psychoanalytic approach?
answered
Jan 20
in
Psychology
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