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26
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How does the size and shape of a catalyst affect the rate of a catalytic reaction?
answered
1 day
ago
in
Physical Chemistry
0
votes
29
views
How does the excitation of molecules and materials by light result in the absorption or emission of photons at specific wavelengths, and what are the quantum mechanics principles behind it, in the context of photochemistry and photophysics?
answered
5 days
ago
in
Quantum Chemistry
0
votes
19
views
How does the enzymatic activity of RNA polymerase influence the accuracy of transcription in eukaryotic cells?
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5 days
ago
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BioChemistry
0
votes
19
views
How does the adsorption energy of CO on metal surfaces vary with surface composition, and how can this information be utilized to optimize catalysts for CO conversion reactions using Density Functional Theory calculations?
answered
Feb 17
in
Computational Chemistry
0
votes
31
views
How does sunlight affect the degradation of pollutants, such as pesticides and herbicides, in the environment and what are the chemical processes involved in photochemical degradation?
answered
Feb 14
in
PhotoChemistry
0
votes
30
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What are the effects of sintering temperature on the microstructure and mechanical properties of alumina-zirconia composites?
answered
Feb 14
in
Materials Chemistry
0
votes
24
views
How can we predict the catalytic activity and selectivity of a molecule using quantum chemistry calculations?
answered
Feb 14
in
Quantum Chemistry
0
votes
38
views
What is the difference between ionic and covalent bonds and how do their structures affect their properties? Provide examples of compounds for each type of bonding and describe their characteristics.
answered
Feb 13
in
Chemical education
0
votes
45
views
How can we develop a process for the synthesis of a specialty chemical with high purity and yield while minimizing waste and reducing the use of hazardous chemicals?
answered
Feb 12
in
Chemical engineering
0
votes
39
views
How can the compatibility of polymer blends be improved to achieve a homogenous mixture with desirable mechanical properties?
answered
Feb 6
in
Polymer Chemistry
0
votes
40
views
How can chemists modify the chemical structure of existing antibiotics to overcome drug-resistant bacterial infections like MRSA (Methicillin-Resistant Staphylococcus Aureus)?
answered
Feb 5
in
Medicinal Chemistry
0
votes
48
views
Calculate the standard enthalpy of formation for hydrogen peroxide (H2O2) at 298 K, given that the standard enthalpy change of formation for water (H2O) is -285.8 kJ/mol and the standard enthalpy change of formation for oxygen gas (O2) is 0 kJ/mol.
answered
Feb 3
in
Chemical thermodynamics
0
votes
46
views
Calculate the standard enthalpy change for the reaction: 2H2(g) + O2(g) → 2H2O(l)Given the standard enthalpies of formation are: ΔHf°(H2O(l)) = -285.8 kJ/mol ΔHf°(H2(g)) = 0 kJ/mol ΔHf°(O2(g)) = 0 kJ/mol Assume all reactants and products are at standard state conditions.
answered
Feb 3
in
Chemical thermodynamics
0
votes
74
views
What happens to the rate of a photochemical reaction as the intensity of light increases? Provide examples of photochemical reactions and their corresponding rates at different light intensities. How can this information be applied in the development of photovoltaic cells?
answered
Jan 31
in
Physical Chemistry
0
votes
84
views
What is the major product of the reaction between 2-methyl-2-pentanol and conc. HBr?
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Jan 21
in
Organic Chemistry
0
votes
47
views
According to Erikson's psychosocial theory, what is the final stage of development?
answered
Jan 20
in
Psychology
0
votes
50
views
What is the concept of the authentic self in existential psychology?
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Jan 15
in
Psychology
0
votes
35
views
What is the role of anxiety in existential psychology?
answered
Jan 15
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Psychology
0
votes
56
views
What is the biopsychosocial model of pain?
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Jan 14
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Psychology
0
votes
30
views
What is cultural humility?
answered
Jan 14
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Psychology
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