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0
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1
answer
29
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How does the photochemical behavior of coordination compounds depend on the nature of their ligands? Provide experimental evidence and thoroughly explain the observed trend.
asked
Feb 22
in
PhotoChemistry
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votes
1
answer
32
views
What is the optimum ratio of diisocyanate and polyol required for the synthesis of polyurethane of desired properties and how does the ratio affect the physical and chemical properties of the final product?
asked
Feb 22
in
Chemical synthesis
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votes
1
answer
26
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What is the molecular geometry of a molecule of ammonia (NH3) and what are the bond angles between the nitrogen atom and each of the three hydrogen atoms?
asked
Feb 21
in
Quantum Chemistry
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votes
1
answer
39
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What is the bond dissociation energy of one of the C-H bonds in a methane (CH4) molecule?
asked
Feb 18
in
Chemical bonding
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1
answer
63
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How do the properties of liquid crystals change with temperature and external electric fields?
asked
Feb 13
in
Physical Chemistry
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votes
1
answer
64
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What is the oxidation state of nitrogen in NH4NO2?
asked
Feb 13
in
Chemical reactions
0
votes
1
answer
66
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What is the coulometric titration method for quantifying the amount of copper in a brass sample? Provide a detailed procedure for carrying out the coulometric titration method to determine the amount of copper in the sample.
asked
Feb 12
in
Analytical Chemistry
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votes
1
answer
63
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What is the role of coordination chemistry in elucidating the mechanism of Heme-catalyzed reactions in metalloproteins and enzymes and how does it contribute to our understanding of biological processes?
asked
Feb 12
in
Coordination Chemistry
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votes
1
answer
139
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How can the surface properties of biomaterials be modified to promote attachment and growth of specific types of cells for tissue engineering applications?
asked
Feb 11
in
Materials Chemistry
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votes
1
answer
39
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How can the photochemical degradation of pollutants in the environment be enhanced using advanced oxidation processes (AOPs) and what are the mechanisms of such processes?
asked
Feb 10
in
PhotoChemistry
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votes
1
answer
43
views
How can the magnetic properties of different materials be analyzed and compared to determine their suitability for use in data storage applications?
asked
Feb 7
in
Materials Chemistry
0
votes
1
answer
32
views
How can the design of a drug target specific types of cancer cells based on their unique genetic characteristics and biochemical pathways, while minimizing toxicity to healthy cells?
asked
Feb 6
in
Medicinal Chemistry
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votes
1
answer
37
views
How can the adhesive properties of a polymer-based adhesive be optimized for a specific application, considering factors such as bonding strength, environmental conditions, and chemical compatibility with the surfaces being bonded?
asked
Feb 6
in
Polymer Chemistry
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votes
1
answer
77
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Design a chemical reactor system to produce 100 litres of ammonia per hour from hydrogen and nitrogen gases. The reaction occurs at 450°C and 200 atm pressure. The reactor should have a conversion rate of at least 95% and a selectivity of 100% towards ammonia production. The feed gases are available at a rate of 200 litres per minute each, and the reactor should operate continuously for 30 days. Also, ensure that the reactor design considers the safety precautions required for handling flammable gases and high-pressure materials. Provide a detailed technical report of your reactor design with an analysis of the efficiency, cost, and environmental impact.
asked
Feb 3
in
Chemical engineering
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votes
1
answer
70
views
How does changing the concentration of reactants affect the reaction rate in the chemical reaction between HCl and Na2S2O3?
asked
Feb 3
in
Chemical kinetics
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votes
1
answer
134
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How do different types of additives, such as antioxidants or UV stabilizers, impact the environmental degradation of common polymer-based packaging materials, such as polyethylene or PET?
asked
Jan 30
in
Polymer Chemistry
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votes
1
answer
77
views
Calculate the melting and boiling points of Sodium Chloride (NaCl) using the Clausius-Clapeyron Equation given that the heat of fusion for NaCl is 28.9 kJ/mol, the heat of vaporization is 163.0 kJ/mol and the standard entropy change for phase transition is 72.14 J/K/mol.
asked
Jan 23
in
Inorganic Chemistry
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votes
1
answer
66
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Calculate the change in enthalpy for the following chemical reaction: CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l) Given that the enthalpies of formation for CH4(g), CO2(g), and H2O(l) are -74.8 kJ/mol, -393.5 kJ/mol, and -285.8 kJ/mol respectively.
asked
Jan 23
in
Chemical reactions
0
votes
1
answer
39
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A student is designing an electrochemical cell using zinc and copper electrodes. The student wants to know the current density (in A/cm²) when the cell operates at a voltage of 1.5 V and a temperature of 25°C. The area of the zinc electrode is 10 cm², and the area of the copper electrode is 5 cm². Assuming a 2:1 ratio for the transfer of electrons between the two electrodes, calculate the current density in the cell.
asked
Jan 22
in
ElectroChemistry
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votes
1
answer
81
views
How did Watson's 'Little Albert' experiment demonstrate classical conditioning?
asked
Jan 20
in
Psychology
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