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What is the optimal temperature and duration required for the preparation of p-nitroaniline from aniline and nitric acid to achieve maximum yield?
asked
3 days
ago
in
Chemical synthesis
0
votes
1
answer
18
views
What is the predicted bond angle in a water molecule, and how does this angle contribute to the molecule's polarity and unique properties?
asked
3 days
ago
in
Chemical bonding
0
votes
1
answer
23
views
How does the pH of the solution affect the reaction rate of the enzymatic hydrolysis of sucrose using invertase enzyme?
asked
3 days
ago
in
Chemical kinetics
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votes
1
answer
18
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What is the most efficient method for preparing phenylalanine from benzyl chloride and ammonia, and how can the purity of the product be ensured?
asked
4 days
ago
in
Chemical synthesis
0
votes
1
answer
22
views
How does the energy of the excited state dynamics of a molecule change as a function of its molecular geometry, and how can ab initio calculations be utilized to predict this behavior?
asked
5 days
ago
in
Computational Chemistry
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votes
1
answer
26
views
How does the chemical composition of crude oil impact the severity of environmental damage caused by an oil spill, and what chemical treatments can be used to mitigate this damage?
asked
Feb 18
in
Environmental Chemistry
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votes
1
answer
28
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What is the bond dissociation energy of the O-H bond in a water (H2O) molecule at 298 K?
asked
Feb 18
in
Chemical bonding
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votes
1
answer
33
views
How do mutations in amino acid sequences of proteins affect their folding and function? Provide examples and explain how this information can be used in the development of targeted drug therapies.
asked
Feb 13
in
BioChemistry
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votes
1
answer
10
views
How can we design drugs that target the GABA-A receptor to treat anxiety disorders with fewer side effects?
asked
Feb 12
in
Medicinal Chemistry
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votes
1
answer
33
views
How can the synthesis of polypropylene from propylene monomer using Ziegler-Natta catalyst be optimized to maximize the yield and improve the polymer properties?
asked
Feb 11
in
Chemical synthesis
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votes
1
answer
10
views
How can the synthesis of biodegradable polymers be optimized to ensure maximum efficiency and reduce environmental impact?
asked
Feb 11
in
Polymer Chemistry
0
votes
1
answer
45
views
How can the surface of a biomaterial be modified to enhance biocompatibility and reduce the risk of rejection by the host immune system?
asked
Feb 11
in
Surface Chemistry
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votes
1
answer
46
views
How does changing the concentration of reactants and products affect the rate of a reversible chemical reaction at equilibrium?
asked
Feb 3
in
Chemical kinetics
0
votes
1
answer
70
views
What is the dipole moment of carbon dioxide (CO2)? Show your calculations and explain how the molecular geometry and polarity contribute to the overall dipole moment of the molecule.
asked
Jan 31
in
Chemical bonding
0
votes
1
answer
69
views
What are some common misconceptions or misunderstandings that students have when learning about the periodic table and chemical elements, and how can these be addressed and overcome through effective chemical education techniques?
asked
Jan 30
in
Chemical education
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votes
1
answer
76
views
A chemistry student wants to determine the amount of iron present in a sample of orange juice. The student takes a 50 mL sample of orange juice and reacts it with excess potassium dichromate in acidic solution. After the reaction, the remaining potassium dichromate requires 12.75 mL of a 0.015 M ferrous ammonium sulfate solution to complete the reaction. What is the mass of iron present in the sample of orange juice?
asked
Jan 22
in
Analytical Chemistry
0
votes
1
answer
38
views
Who conducted the famous 'marshmallow experiment'?
asked
Jan 20
in
Psychology
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votes
1
answer
25
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When treating substance use disorders, what is motivational interviewing?
asked
Jan 17
in
Psychology
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votes
1
answer
58
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Why is the cognitive-behavioural theory used in forensic psychology?
asked
Jan 16
in
Psychology
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votes
1
answer
89
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What is a sample bias, and how can it impact study findings?
asked
Jan 15
in
Psychology
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