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0
votes
34
views
How does the size or shape of gold nanoparticles affect their catalytic activity in the oxidation of carbon monoxide?
answered
Feb 24
in
Materials Chemistry
0
votes
29
views
What is the effect of varying the size and shape of gold nanoparticles on their catalytic activity in the reduction of 4-nitrophenol, and how does this compare to other common catalysts such as silver or palladium nanoparticles?
answered
Feb 24
in
Materials Chemistry
0
votes
28
views
How does the size and concentration of microplastics in seawater affect the bioaccumulation of harmful chemicals in marine animals, and what are the potential consequences for human consumption of contaminated seafood?
answered
Feb 24
in
Environmental Chemistry
0
votes
38
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Identify the type of inorganic compound formed by the combination of sodium and chlorine atoms. Is the resulting compound ionic, covalent, or metallic? Justify your answer with appropriate reasoning.
answered
Feb 20
in
Inorganic Chemistry
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votes
33
views
What is the mechanism behind the competition between S<sub>N</sub>1 and S<sub>N</sub>2 reactions in nucleophilic substitution of primary alkyl halides? Provide specific examples to support your explanation.
answered
Feb 18
in
Organic Chemistry
0
votes
32
views
How does the surface modification of polymers affect their hydrophilicity and adhesion properties?
answered
Feb 17
in
Surface Chemistry
0
votes
27
views
What is the mechanism of action of the natural product, resveratrol, and how can it be effectively utilized in the development of novel drugs for the treatment of cancer?
answered
Feb 14
in
Medicinal Chemistry
0
votes
34
views
What is the role of metal ions in metalloproteins such as hemoglobin, myoglobin, and cytochrome c? Specifically, explain how metal coordination affects the function and activity of metalloenzymes in biological systems.
answered
Feb 13
in
Coordination Chemistry
0
votes
66
views
What is the effect of changing the size and shape of a ligand on the rate of ligand substitution reactions in coordination chemistry?
answered
Feb 13
in
Coordination Chemistry
0
votes
120
views
What is the relationship between a molecule and its enantiomer in terms of chirality, and how can their properties differ? Provide an example of two enantiomers with differing properties.
answered
Feb 13
in
Organic Chemistry
0
votes
39
views
What is the predicted color of the inorganic compound copper sulfate (CuSO4) based on its electronic configuration and crystal field theory?
answered
Feb 12
in
Inorganic Chemistry
0
votes
36
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How can the mechanical and thermal properties of polymer-based composites be optimized for specific aerospace applications?
answered
Feb 7
in
Polymer Chemistry
0
votes
38
views
How can environmental chemistry principles be incorporated into the curriculum of high school chemistry courses effectively, to ensure students have a better understanding of the impact of chemicals and pollutants on the environment and human health?
answered
Feb 5
in
Chemical education
0
votes
91
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Consider a zinc electrode in a concentration cell that is connected to a copper electrode through a salt bridge. During the electrolysis of an aqueous solution of ZnSO4, a current of 2.5 A is passed through the cell for 20 minutes. Calculate the mass of zinc deposited on the electrode during this time assuming 100% efficiency. (Molar mass of zinc = 65.38 g/mol)
answered
Feb 3
in
ElectroChemistry
0
votes
111
views
How do changes in the lipid composition of a cell membrane affect its permeability to specific molecules? Provide examples of lipids that increase or decrease membrane permeability and explain why this occurs on a molecular level.
answered
Jan 31
in
BioChemistry
0
votes
76
views
How can liquid chromatography be optimized to detect and quantify trace amounts of a specific compound in a complex mixture?
answered
Jan 29
in
Analytical Chemistry
0
votes
67
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Calculate the corrosion rate of an iron rod with a surface area of 20 cm² that is connected to a copper plate with a surface area of 25 cm², immersed in a solution of 0.5 M copper sulfate, given that the measured current is 0.2 A.
answered
Jan 23
in
ElectroChemistry
0
votes
59
views
What theory did Watson & Rayner's Little Albert experiment contribute to?
answered
Jan 20
in
Psychology
0
votes
108
views
Where did Susan Nolen-Hoeksema conduct her research on depression?
answered
Jan 20
in
Psychology
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votes
65
views
What is the cognitive theory's explanation for the perception of illusions?
answered
Jan 20
in
Psychology
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