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0
votes
1
answer
19
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What is the relationship between zeta potential and colloidal stability? How can zeta potential be measured experimentally? What factors affect the zeta potential of a particular colloidal system?
asked
1 day
ago
in
Surface Chemistry
0
votes
1
answer
27
views
How do the photochemical properties of lanthanide complexes vary with changes in the coordination environment and ligands used in the complex?
asked
4 days
ago
in
PhotoChemistry
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votes
1
answer
18
views
What is the most effective catalyst to use in the process of producing adhesives using formaldehyde and urea?
asked
4 days
ago
in
Chemical engineering
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votes
1
answer
21
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What are the mechanisms behind the long-lived emission of phosphorescent materials under light excitation, and how can these materials be optimized to increase their efficiency and stability in various photochemical applications?
asked
5 days
ago
in
PhotoChemistry
0
votes
1
answer
36
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What chemical pollutants are present in landfill leachate and how do they impact the quality of groundwater in the surrounding area?
asked
Feb 13
in
Environmental Chemistry
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votes
1
answer
10
views
How does computational modeling help in understanding enzyme catalysis and designing more efficient enzyme inhibitors?
asked
Feb 12
in
Computational Chemistry
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votes
1
answer
40
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How can computational chemistry and molecular docking studies be applied to identify potential drug candidates for the treatment of cancer?
asked
Feb 5
in
Computational Chemistry
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votes
1
answer
28
views
How can small molecule inhibitors target specific immune cells and modulate their activity to treat autoimmune diseases?
asked
Feb 5
in
Medicinal Chemistry
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votes
1
answer
10
views
Here's a precise problem for a chemistry student to solve related to designing a heat exchanger for a specific process:A chemical plant produces a product with a flow rate of 500 liters per hour, and it needs to be cooled from its initial temperature of 120°C to its final temperature of 80°C before it can be packaged for shipment. The cooling medium that will be used is water, which is available at a flow rate of 400 liters per hour and an initial temperature of 20°C. Design a heat exchanger to cool the product and determine the required surface area of the heat exchanger if the overall heat transfer coefficient is 500 W/m2K.
asked
Feb 4
in
Chemical engineering
0
votes
1
answer
61
views
How does a change in the reaction mechanism affect the rate of reaction in a chemical reaction? Provide an experimental investigation to support your answer.
asked
Jan 30
in
Chemical kinetics
0
votes
1
answer
97
views
What is the concentration of chloride ions (Cl-) in a water sample if the measured potential difference is -0.45V using a silver/silver-chloride (Ag/AgCl) electrode? The standard electrode potential for the half-cell reaction AgCl(s) + e- → Ag(s) + Cl-(aq) is 0.222V. The temperature of the sample is 25°C and the ionic strength is 0.1M.
asked
Jan 30
in
Analytical Chemistry
0
votes
1
answer
69
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Calculate the Gibbs free energy change for the reaction: 2H2(g) + O2(g) → 2H2O(g) at standard conditions (298 K and 1 atm pressure) given the following data:ΔH˚f[H2O(g)] = -241.8 kJ/molΔH˚f[H2(g)] = 0 kJ/molΔH˚f[O2(g)] = 0 kJ/molΔS˚[H2(g)] = 130.7 J/K·molΔS˚[O2(g)] = 205.0 J/K·molΔS˚[H2O(g)] = 188.8 J/K·mol
asked
Jan 23
in
Chemical thermodynamics
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votes
1
answer
67
views
Calculate the bond dissociation energy of the O-H bond in a water molecule if the enthalpy change for the following reaction is -285.8 kJ/mol:2H2(g) + O2(g) -> 2H2O(l)
asked
Jan 23
in
ThermoChemistry
0
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1
answer
45
views
What is the main criticism of existential therapy?
asked
Jan 20
in
Psychology
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votes
1
answer
36
views
How do social norms influence behaviour?
asked
Jan 20
in
Psychology
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votes
1
answer
29
views
When seeking to make change at a systemic level, what is the term for advocating for policy change?
asked
Jan 20
in
Psychology
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votes
1
answer
46
views
According to the visual search task, how do people search for a target item amidst distractors?
asked
Jan 20
in
Psychology
0
votes
1
answer
56
views
Why is the self-control theory criticised?
asked
Jan 16
in
Psychology
0
votes
1
answer
23
views
What is the diathesis-stress model?
asked
Jan 14
in
Psychology
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votes
1
answer
54
views
What is the central route to persuasion?
asked
Jan 14
in
Psychology
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