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1
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What is the most efficient method for synthesizing silver nanoparticles with a uniform size distribution, and how can this method be optimized to produce maximum yield?
asked
3 days
ago
in
Materials Chemistry
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votes
1
answer
24
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What is the most effective method for synthesizing gold nanoparticles with a narrow size distribution suitable for use in medical imaging?
asked
3 days
ago
in
Materials Chemistry
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votes
1
answer
27
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How does the degree of conjugation in a polymer affect its electronic and optical properties, and how can this be calculated using quantum chemistry methods?
asked
5 days
ago
in
Quantum Chemistry
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votes
1
answer
24
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How does the coordination chemistry of chelating agents influence their effectiveness in chelation therapy for heavy metal poisoning?
asked
6 days
ago
in
Coordination Chemistry
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votes
1
answer
7
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How does the composition of landfill leachate impact the quality of groundwater in the surrounding area, and what are the specific chemicals and pollutants present in the leachate that cause the most significant harm to the groundwater?
asked
6 days
ago
in
Environmental Chemistry
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votes
1
answer
36
views
How does the absorption of light by an organic compound lead to the formation of excited states, and how do these excited states subsequently react to form different photoproducts?
asked
Feb 17
in
PhotoChemistry
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votes
1
answer
44
views
What are the current challenges in developing drugs for the treatment of inflammatory bowel disease (IBD) and how can medicinal chemistry aid in the development of more effective and targeted therapies?
asked
Feb 13
in
Medicinal Chemistry
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votes
1
answer
34
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How do the photochemical properties of enantiomers differ from each other? Provide examples with explanations.
asked
Feb 13
in
PhotoChemistry
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votes
1
answer
51
views
What is the molecular structure and properties of collagen, the most abundant protein in the human body? How does its structure relate to its function in providing support and flexibility to tissues such as skin, bones, and tendons?
asked
Feb 12
in
Organic Chemistry
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votes
1
answer
36
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How can the chemical engineering principles be applied to design a cost-effective and efficient system for the production of natural flavors using raw materials that are readily available?
asked
Feb 6
in
Chemical engineering
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votes
1
answer
33
views
How can chemistry instructors effectively incorporate safety protocols into their curriculum to ensure that students understand and prioritize laboratory safety in their future academic and professional careers?
asked
Feb 4
in
Chemical education
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votes
1
answer
56
views
Given the reaction A + B ⇌ C and the equilibrium constant, Kc = 2.0 at a certain temperature, if the initial concentration of A is 0.1 M and the initial concentration of B is 0.2 M, what is the equilibrium concentration of C if the reaction proceeds with a rate constant of 0.05 M/s?
asked
Feb 4
in
Chemical kinetics
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votes
1
answer
12
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Consider the reaction N2O4(g) ⇌ 2NO2(g) which is exothermic. If the pressure of the system is increased, predict the direction in which the equilibrium will shift, and explain your answer using Le Chatelier's principle.
asked
Feb 3
in
Chemical reactions
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votes
1
answer
60
views
What is the effect of changing the concentration of reactants on the reaction rate and yield of a chemical reaction?
asked
Feb 3
in
Chemical kinetics
0
votes
1
answer
77
views
What is the role of ATP synthase in the oxidative phosphorylation process of the citric acid cycle? How does it contribute to the production of ATP molecules in the cell?
asked
Jan 31
in
BioChemistry
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votes
1
answer
78
views
What is the amount of copper ions present in a 1.0 mL sample of copper sulfate solution, when a current of 3.0 A for 10 seconds is used for coulometry analysis, assuming 100% efficiency in electrode reactions and a coulombic efficiency of 90%?
asked
Jan 30
in
Analytical Chemistry
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1
answer
111
views
How to identify the presence of lead and cadmium in a soil sample using X-ray fluorescence spectroscopy?
asked
Jan 30
in
Analytical Chemistry
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1
answer
40
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Calculate the equilibrium constant (Kc) at 25°C for the following redox reaction involving a weak oxidizing agent: H2O2(aq) + 2I^-(aq) + 2H^+(aq) ⇌ I2(aq) + 2H2O(l)
asked
Jan 23
in
Chemical equilibrium
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votes
1
answer
62
views
Calculate the enthalpy of desorption of CO2 from sodium hydroxide (NaOH) pellets given the following information: - The heat of absorption of CO2 by NaOH pellets is -20.9 kJ/mol.- The standard enthalpy of formation of Na2CO3 is -1130 kJ/mol.- The standard enthalpy of formation of water is -286 kJ/mol.- The standard enthalpy of formation of NaOH is -425 kJ/mol. Assuming that the desorption process is the reverse of the absorption process, determine the enthalpy change for the reaction: Na2CO3(s) + H2O(l) → 2NaOH(s) + CO2(g).
asked
Jan 23
in
ThermoChemistry
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votes
1
answer
39
views
Calculate the enthalpy change for the reaction: 2H2O(l) → 2H2(g) + O2(g) given the following bond enthalpies: H-H (436 kJ/mol), O=O (498 kJ/mol), H-O (463 kJ/mol). Is the reaction exothermic or endothermic?
asked
Jan 23
in
Chemical thermodynamics
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