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1
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What is the relationship between the size and shape of nanoparticles and their photochemical properties? Specifically, how does the absorption and emission spectra of gold nanoparticles change as their size and shape are varied?
asked
2 days
ago
in
PhotoChemistry
0
votes
1
answer
19
views
What is the most efficient and effective method to prepare phenylalanine from benzyl chloride and ammonia, and how can you achieve the highest yield possible?
asked
5 days
ago
in
Chemical synthesis
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votes
1
answer
29
views
What is the effect of different polymer structures on the efficiency of polymer-based photovoltaic cells?
asked
Feb 20
in
Polymer Chemistry
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votes
1
answer
27
views
What is the bond enthalpy of the carbon-carbon double bond (C=C) in ethene (C2H4) when 120 kJ/mol of energy is required to break the bond?
asked
Feb 18
in
Chemical bonding
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votes
1
answer
28
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How can the yield of polyacrylonitrile production be improved by optimizing reaction conditions, such as temperature, catalyst type and concentration, and monomer feed rate?
asked
Feb 13
in
Chemical synthesis
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votes
1
answer
40
views
How does the doping of graphene affect its electrical conductivity and thermal stability, and how can this information be utilized to enhance its performance as a material for electronic devices?
asked
Feb 12
in
Materials Chemistry
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votes
1
answer
61
views
How can the process of extrusion be optimized to enhance the strength and durability of polymer materials during manufacturing?
asked
Feb 10
in
Polymer Chemistry
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votes
1
answer
49
views
How can the efficiency of the process for the production of nitrogen gas be improved without compromising the purity of the final product?
asked
Feb 7
in
Chemical engineering
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votes
1
answer
37
views
How can polymer chain length distribution be determined using gel permeation chromatography and what are the limitations and advantages of this technique?
asked
Feb 5
in
Polymer Chemistry
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votes
1
answer
40
views
Determine the equilibrium constant (Kc) for the chemical reaction: 2 SO2(g) + O2(g) ⇌ 2 SO3(g)Given that at a certain temperature, the concentrations of SO2, O2, and SO3 are 0.25 M, 0.15 M, and 0.40 M, respectively, at equilibrium.
asked
Feb 4
in
Chemical thermodynamics
0
votes
1
answer
68
views
What is the most stable conformation of 1,2-dichloroethane and how does it affect the molecule's dipole moment? Use computational chemistry and molecular modeling to calculate the energy of different conformations and analyze their dipole moments.
asked
Jan 31
in
Physical Chemistry
0
votes
1
answer
92
views
What is the concentration of copper ions (Cu2+) in a water sample if a voltammetry experiment showed a peak current of 0.25 mA at a potential of 0.5 V vs. Ag/AgCl electrode, and the calibration plot showed a linear relationship between peak current and concentration of Cu2+ in the range of 5-50 µM?
asked
Jan 30
in
Analytical Chemistry
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votes
1
answer
89
views
A current of 2.5 amperes was passed through molten silver chloride for 5 hours. What mass of silver metal will be deposited? (The atomic mass of silver = 107.87 g/mol)
asked
Jan 22
in
ElectroChemistry
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votes
1
answer
35
views
Who conducted the famous 'marshmallow test'?
asked
Jan 20
in
Psychology
0
votes
1
answer
42
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Why is the evolutionary approach important for understanding human behaviour?
asked
Jan 20
in
Psychology
0
votes
1
answer
76
views
According to the Continuity Theory, how do individuals adapt to end-of-life challenges?
asked
Jan 17
in
Psychology
0
votes
1
answer
11
views
Why is it important to use blind or double-blind procedures in psychology research?
asked
Jan 17
in
Psychology
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votes
1
answer
20
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Please evaluate the spotlight model of attention.
asked
Jan 16
in
Psychology
0
votes
1
answer
28
views
What is the maturation effect?
asked
Jan 16
in
Psychology
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votes
1
answer
73
views
According to the attachment theory, why do we form emotional bonds with others?
asked
Jan 16
in
Psychology
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