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0
votes
1
answer
30
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How does the size and shape of nanoparticles affect their catalytic activity in a specific reaction?
asked
1 day
ago
in
Materials Chemistry
0
votes
1
answer
21
views
What is the relationship between the size of nanoparticles and their surface area to volume ratio, and how does this affect their properties and potential applications in different fields?
asked
1 day
ago
in
Physical Chemistry
0
votes
1
answer
24
views
What is the effect of ligand modification on the photochemical properties of lanthanide complexes? How does the presence of heavy atoms in the ligand affect the absorption and emission spectra of these complexes?
asked
4 days
ago
in
PhotoChemistry
0
votes
1
answer
22
views
What is the mechanism of a nucleophilic substitution reaction between 1-bromobutane and sodium hydroxide in ethanol solvent? Provide the balanced chemical equation and draw the reaction mechanism, indicating the intermediates and the transition state.
asked
4 days
ago
in
Organic Chemistry
0
votes
1
answer
25
views
What is the coordination geometry and number of the metal center in hemoglobin and myoglobin? How does this affect the binding and transport of oxygen in these metalloproteins?
asked
5 days
ago
in
Coordination Chemistry
0
votes
1
answer
24
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What is the effect of temperature on the rate of a catalytic reaction between hydrogen gas and iodine gas in the presence of a solid catalyst?
asked
6 days
ago
in
Physical Chemistry
0
votes
1
answer
28
views
What is the effect of polymer molecular weight and chemical structure on drug release profiles in polymer-based drug delivery systems?
asked
6 days
ago
in
Polymer Chemistry
0
votes
1
answer
32
views
What are the photochemical properties of [Fe(CN)5(NO)]4- complex and how do they change under different light conditions?
asked
Feb 17
in
PhotoChemistry
0
votes
1
answer
27
views
What is the boiling point trend of primary, secondary, and tertiary amines in comparison to their respective alkanes with the same molecular weight? Provide an explanation for the observed trend using intermolecular forces.
asked
Feb 14
in
Organic Chemistry
0
votes
1
answer
34
views
How can the efficiency of a hydrogen production system be optimized by choosing the appropriate catalyst and operating conditions?
asked
Feb 7
in
Chemical engineering
0
votes
1
answer
59
views
Can SERS be used as a reliable technique to detect trace amounts of pesticides on food products?
asked
Feb 3
in
Surface Chemistry
0
votes
1
answer
61
views
Calculate the standard enthalpy change for the complete combustion of methane gas (CH4) at 25°C and 1 atm pressure, given that the standard enthalpy of formation for CH4 is -74.9 kJ/mol and the standard enthalpy of formation for water (H2O) is -285.8 kJ/mol.
asked
Feb 3
in
Chemical thermodynamics
0
votes
1
answer
42
views
Calculate the monolayer capacity and specific surface area of a sample of silica gel using BET theory. The sample was found to have a weight of 2.56 g and a total surface area of 260 m²/g. The gas used for adsorption was nitrogen at a temperature of 77 K and a pressure range of 0.01-0.3 P/P₀. The plot of (P/P₀)/(V₀/V) versus P/P₀ generated a straight line with a slope of 4.2×10⁻³.
asked
Feb 3
in
Surface Chemistry
0
votes
1
answer
60
views
What is the predicted rate and mechanism of the reaction between methane and chlorine gas at 25°C in the gas phase using quantum chemical calculations?
asked
Jan 31
in
Quantum Chemistry
0
votes
1
answer
58
views
Calculate the heat of formation of a water molecule from its elements, hydrogen and oxygen gas, given that the standard enthalpy of formation of hydrogen gas is -285.8 kJ/mol and the standard enthalpy of formation of oxygen gas is 0 kJ/mol. Show all your work and explain what the resulting sign of the enthalpy of formation means in terms of the stability of the water molecule.
asked
Jan 23
in
Chemical bonding
0
votes
1
answer
65
views
Calculate the electrical double layer thickness of a silica particle with a radius of 50 nm, assuming the particle is in water at room temperature and has a surface charge density of -0.05 C/m².
asked
Jan 23
in
Physical Chemistry
0
votes
1
answer
34
views
What is the name of the theory that suggests that our behaviour is the result of the interactions between our genes and the environment?
asked
Jan 20
in
Psychology
0
votes
1
answer
72
views
According to the diathesis-stress model, what factors can influence the severity of a mental disorder?
asked
Jan 20
in
Psychology
0
votes
1
answer
70
views
What is the evolutionary theory explanation for personality disorders?
asked
Jan 20
in
Psychology
0
votes
0
answers
39
views
Who proposed the cognitive development theory?
asked
Jan 20
in
Psychology
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