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1
answer
25
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What is the role of the photostability and photoreactivity of sunscreen agents in preventing skin damage caused by UV radiation?
asked
1 day
ago
in
PhotoChemistry
0
votes
1
answer
21
views
What is the predicted bond angle in a water molecule (H2O)?
asked
3 days
ago
in
Chemical bonding
0
votes
1
answer
31
views
What is the coordination geometry of the active site in the metalloenzyme carbonic anhydrase? How does the coordination geometry of the metal ion in the active site affect the enzyme's catalytic activity?
asked
6 days
ago
in
Coordination Chemistry
0
votes
1
answer
25
views
How does the choice of exchange-correlation functional affect the accuracy of Density Functional Theory (DFT) calculations in predicting the catalytic activity of a specific reaction?
asked
Feb 18
in
Computational Chemistry
0
votes
1
answer
27
views
How does the surface modification of polymers affect their adhesion properties? Compare the adhesion strength of unmodified polymer surfaces to those treated with different surface modification techniques.
asked
Feb 17
in
Surface Chemistry
0
votes
1
answer
33
views
What are the specific economic benefits of studying chemistry and how can this knowledge be effectively applied to address current societal challenges such as climate change and resource depletion?
asked
Feb 14
in
Chemical education
0
votes
1
answer
31
views
How do nitrogen and phosphorus pollution affect the chemical and physical properties of water bodies and what chemical methods can be used to remediate these pollutants from water sources?
asked
Feb 13
in
Environmental Chemistry
0
votes
1
answer
54
views
How do different doping agents affect the electrical conductivity and stability of conductive polymers used in flexible electronics?
asked
Feb 12
in
Materials Chemistry
0
votes
1
answer
9
views
How can the properties of metal alloys be optimized for use in aerospace applications, taking into consideration factors such as strength, durability, and weight?
asked
Feb 10
in
Materials Chemistry
0
votes
1
answer
31
views
How can chemistry teachers provide better support and accommodations for students with learning disabilities to help them succeed in their chemistry coursework?
asked
Feb 5
in
Chemical education
0
votes
1
answer
30
views
How can chemistry educators adapt their teaching methods to encourage meaningful learning and engagement for students in situations where hands-on experimentation is limited?
asked
Feb 4
in
Chemical education
0
votes
1
answer
33
views
How can a chemical engineer develop a cost-effective process for the production of 1 ton of ethylene glycol using a fixed-bed catalytic reactor?
asked
Feb 4
in
Chemical engineering
0
votes
1
answer
44
views
Determine the hybridization of the central atom in the compound XeF6.
asked
Feb 4
in
Inorganic Chemistry
0
votes
1
answer
55
views
What are the mechanisms by which bacteria develop resistance to antibiotics, and how can medicinal chemists modify existing antibiotics or develop new ones to overcome these mechanisms and effectively combat drug-resistant bacteria?
asked
Jan 31
in
Medicinal Chemistry
0
votes
1
answer
11
views
What is the calculated bandgap of a silicon crystal using Density Functional Theory (DFT) calculations, with a lattice parameter of 5.43 Å? How does the calculated bandgap compare to experimental values reported in the literature?
asked
Jan 31
in
Computational Chemistry
0
votes
1
answer
72
views
What is the percentage composition of a mixture of benzene and toluene using gas chromatography?
asked
Jan 31
in
Analytical Chemistry
0
votes
1
answer
86
views
How can we use Raman spectroscopy to identify the presence of specific compounds in a sample, and what are the factors which affect the accuracy of our results?
asked
Jan 30
in
Analytical Chemistry
0
votes
1
answer
57
views
Calculate the enthalpy change for the ionization of 1 mol of hydrogen chloride gas at standard conditions, given that the enthalpy change for the reaction HCl(g) → H+(aq) + Cl-(aq) is -74.8 kJ/mol.
asked
Jan 23
in
ThermoChemistry
0
votes
1
answer
55
views
Calculate the enthalpy change for the dissolution of 10 g of NaOH in 100 mL of water at 25°C. The molar heat of dissolution of NaOH is -44.51 kJ/mol.
asked
Jan 23
in
ThermoChemistry
0
votes
1
answer
101
views
A chemistry student needs to calculate the heat of sublimation for iodine given that its enthalpy of fusion is 15.52 kJ/mol and its enthalpy of vaporization is 41.57 kJ/mol. The molar mass of iodine is 126.90 g/mol. What is the heat of sublimation for iodine in kJ/mol?
asked
Jan 22
in
ThermoChemistry
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