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What is the relationship between the electronic excited states and the optical properties of a certain molecule, and how can this be calculated using quantum chemistry methods?
asked
1 day
ago
in
Quantum Chemistry
1
answer
26
views
What is the hybridization of the central carbon atom in the molecule CH4?
answered
5 days
ago
in
Chemical bonding
1
answer
25
views
What is the enthalpy of formation of water (H2O) from its elements hydrogen and oxygen at standard conditions (25°C and 1 atm)?
answered
5 days
ago
in
ThermoChemistry
1
answer
17
views
What is the effect of varying the ratio of reactants on the reaction rate of a chemical reaction?
answered
5 days
ago
in
Chemical kinetics
1
answer
23
views
How does the coordination environment of a metal ion in a metalloenzyme or metalloprotein affect its catalytic activity? Provide examples from at least three different metalloenzymes or metalloproteins and their respective substrates.
answered
6 days
ago
in
Coordination Chemistry
1
answer
37
views
How does the binding of a transcription factor to DNA affect gene expression? Please provide a detailed explanation of the biochemical processes involved and any relevant examples.
answered
Feb 17
in
BioChemistry
1
answer
22
views
How does the addition of electron-donating or electron-withdrawing substituents affect the electronic and optical properties of conjugated polymers, and how can these changes be accurately calculated using quantum chemistry methods?
answered
Feb 17
in
Quantum Chemistry
1
answer
27
views
How does surface modification of nanoparticles affect their stability and reactivity in aqueous solutions?
answered
Feb 17
in
Surface Chemistry
1
answer
29
views
What are the photochemical properties of silver halide complexes commonly used in traditional black and white photography, and how do they affect the formation of an image?
asked
Feb 14
in
PhotoChemistry
1
answer
25
views
What is the oxidation state of the nitrogen atom in NH4NO3?
asked
Feb 13
in
ElectroChemistry
1
answer
30
views
What happens to the equilibrium position of a reversible reaction if you add more reactants or products? Use Le Chatelier's principle to explain the answer with appropriate examples.
answered
Feb 13
in
Chemical reactions
1
answer
39
views
What is the oxidation state of sulfur in the compound SO3?
asked
Feb 13
in
ElectroChemistry
1
answer
27
views
What is the oxidation state of sulfur in the compound H2SO4 (sulfuric acid), and what is its change in oxidation state during the reaction as it is reduced to H2S (hydrogen sulfide) in a redox reaction with hydrogen gas?
asked
Feb 13
in
Chemical reactions
1
answer
35
views
What is the dipole moment of ethylene (C2H4) as predicted by ab initio calculations, and how does it compare to the experimentally measured value?
asked
Feb 13
in
Computational Chemistry
1
answer
27
views
How can chemistry-related extracurricular activities be made more widely available to students in areas where resources are limited, in order to enhance their learning and interest in the subject?
answered
Feb 5
in
Chemical education
1
answer
22
views
How can quantum computing be used to optimize chemical reactions and molecule simulations?
asked
Feb 5
in
Quantum Chemistry
1
answer
28
views
How can chemistry students find and secure internships or job opportunities despite the limited availability in their area?
asked
Feb 4
in
Chemical education
1
answer
73
views
What type of inorganic compound is aluminum chloride (AlCl3)? Is it ionic, covalent, or metallic? Explain your answer.
asked
Jan 31
in
Inorganic Chemistry
1
answer
37
views
What is the concentration of copper sulfate in a 50 mL solution if the absorbance measured by a spectrophotometer is found to be 0.450 at a wavelength of 450 nm? The molar absorptivity of copper sulfate at this wavelength is 9.6 x 10^3 L/mol.cm.
asked
Jan 30
in
Analytical Chemistry
1
answer
40
views
Calculate the molar mass of barium nitrate (Ba(NO3)2).
asked
Jan 23
in
Inorganic Chemistry
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