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Answers by YQYFlora9901
0
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4
views
How does the size and shape of a quantum dot affect its electronic and optical properties?
answered
1 day
ago
in
Quantum Chemistry
0
votes
30
views
What is the relationship between a molecule's stereoisomers and its optical activity? Provide an example of a chiral molecule and its enantiomers, and explain how their optical activities differ.
answered
1 day
ago
in
Organic Chemistry
0
votes
19
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How does the prediction of electronic and magnetic properties of topological materials, such as graphene and topological insulators, relate to their potential applications in electronic devices and spintronics?
answered
3 days
ago
in
Quantum Chemistry
0
votes
18
views
What is the optimal ratio of diisocyanate to polyol for the synthesis of polyurethane with desired mechanical properties and how does this ratio affect the final characteristics of the material?
answered
3 days
ago
in
Chemical synthesis
0
votes
20
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How does the lipid composition of a cell membrane affect its fluidity and permeability to different molecules?
answered
5 days
ago
in
BioChemistry
0
votes
27
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How does temperature affect the rate of an enzyme-catalyzed reaction? Design an experiment to investigate the optimal temperature range for the enzyme catalysis and explain the mechanism behind the observed results.
answered
Feb 17
in
BioChemistry
0
votes
33
views
What is the bond order of O2 molecule using molecular orbital theory and how does it compare to the bond order of N2?
answered
Feb 13
in
Chemical bonding
0
votes
26
views
How does doping graphene with nitrogen affect its electronic properties and conductivity?
answered
Feb 12
in
Materials Chemistry
0
votes
8
views
How can we design drugs that specifically target gram-negative bacteria without harming the surrounding healthy cells and microbiota?
answered
Feb 12
in
Medicinal Chemistry
0
votes
49
views
What are the key chemical compounds and their ratios required to produce a long-lasting and captivating fragrance, and how can the manufacturing process be optimized to maximize yield with minimal waste?
answered
Feb 12
in
Chemical engineering
0
votes
44
views
How can the process for the production of polyethylene terephthalate (PET) be optimized for higher yield and purity while minimizing waste and energy consumption?
answered
Feb 10
in
Chemical engineering
0
votes
37
views
How can magnetic resonance spectroscopy help in the determination of the structure and properties of complex molecules in biological systems such as proteins, DNA, and RNA?
answered
Feb 5
in
Physical Chemistry
0
votes
46
views
Calculate the standard enthalpy change for the liquid-to-gas phase transition of water at 100°C and atmospheric pressure, given that the enthalpy of vaporization of water is 40.7 kJ/mol.
answered
Feb 3
in
Chemical thermodynamics
0
votes
63
views
What is the effectiveness of the Clean Air Act in reducing air pollution in major cities in the United States?
answered
Jan 31
in
Environmental Chemistry
0
votes
8
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How can the concentration of lead in a sample of water be determined using atomic absorption spectroscopy? What factors should be taken into consideration when preparing the sample and running the analysis? What is the limit of detection for lead using this method, and how does it compare to other methods for detecting heavy metals in water samples?
answered
Jan 29
in
Analytical Chemistry
0
votes
53
views
Calculate the enthalpy change for the hydrolysis of 50 grams of sucrose (C12H22O11) when dissolved in 500 ml of water at 25°C. The molar mass of sucrose is 342.3 g/mol and the enthalpy change per mole of sucrose is -564.8 kJ/mol.
answered
Jan 23
in
ThermoChemistry
0
votes
40
views
According to the bystander effect, what is the effect of the presence of others in an emergency situation?
answered
Jan 20
in
Psychology
0
votes
6
views
Why is the case of Phineas Gage significant?
answered
Jan 20
in
Psychology
0
votes
79
views
Where did Aaron Beck develop the cognitive therapy approach?
answered
Jan 17
in
Psychology
0
votes
12
views
Why is it important to consider the sample size when interpreting statistical significance?
answered
Jan 17
in
Psychology
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