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What is the mechanism behind the polymerization reaction of polyethylene, and how does it differ from the polymerization reaction of polypropylene?
asked
Feb 22
in
Organic Chemistry
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votes
1
answer
27
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What is the optimum reaction temperature for the synthesis of polyvinyl chloride (PVC) from vinyl chloride monomer, and how does this temperature affect the yield and properties of the final PVC product?
asked
Feb 22
in
Chemical synthesis
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votes
1
answer
29
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How does the concentration of a surfactant affect its ability to reduce surface tension of a liquid?
asked
Feb 18
in
Surface Chemistry
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1
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40
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How does the addition of a photosensitizer affect the rate of a photochemical reaction in a solution containing a photolabile compound?
asked
Feb 17
in
Physical Chemistry
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votes
1
answer
57
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What is the role of disulfide bridges in determining the structure and function of proteins, particularly enzymes? How do variations in the number and placement of disulfide bonds affect enzymatic activity?
asked
Feb 12
in
BioChemistry
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votes
1
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109
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How can the process for the production of polymers be optimized to minimize waste and increase efficiency? Include specific steps and techniques that can be utilized to achieve these goals.
asked
Feb 10
in
Chemical engineering
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1
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32
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How can the parameters of the synthesis process be optimized to produce carbon nanotubes with specific properties, such as diameter, length, and chirality, for different applications in materials science and engineering?
asked
Feb 10
in
Materials Chemistry
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votes
1
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58
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How can the mechanical properties of polymer nanocomposites be enhanced by adding a small amount of nanoparticles? What is the role of nanoparticle size, shape, and concentration on the overall performance of the nanocomposite? What techniques can be used to effectively disperse nanoparticles within the polymer matrix?
asked
Feb 10
in
Polymer Chemistry
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36
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How can chemistry teachers provide effective support to students with learning disabilities during laboratory experiments?
asked
Feb 5
in
Chemical education
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1
answer
49
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How can chemistry teachers incorporate more practical applications of chemistry into their lesson plans to better prepare students for future careers in chemical industries?
asked
Feb 5
in
Chemical education
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1
answer
43
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How can chemistry students and teachers work together to advocate for increased funding in order to improve and enrich chemistry education in schools with limited resources?
asked
Feb 4
in
Chemical education
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votes
1
answer
80
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Design a system for the safe storage and transportation of hydrochloric acid with a concentration of 37%. Include calculations for the required storage tank size, appropriate materials for construction, necessary safety features, and transportation methods.
asked
Feb 4
in
Chemical engineering
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1
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102
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What is the dipole moment of a carbon dioxide molecule, and how does it differ from the dipole moment of a water molecule?
asked
Jan 31
in
Chemical bonding
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1
answer
126
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How do carbohydrate-protein interactions play a role in the recognition process of glycoproteins? Provide specific examples of glycoproteins and their associated carbohydrate structures, and explain how these interactions contribute to the protein's function in the cell.
asked
Jan 31
in
BioChemistry
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votes
1
answer
51
views
Calculate the heat absorbed or released during the crystallization of 50g of sodium acetate from a solution if the enthalpy change of the process is -3.9 kJ/mol.
asked
Jan 23
in
ThermoChemistry
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votes
1
answer
69
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Calculate the enthalpy of desorption for water molecules from the surface of a silica gel at a temperature of 25°C using the following information:- The vapor pressure of water at 25°C is 3.17 kPa.- The surface area of the silica gel is 25 cm².- The mass of the silica gel used in the experiment is 2.5 g.
asked
Jan 23
in
ThermoChemistry
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1
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134
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A container initially contains 0.10 mol of NOBr, 0.10 mol of NO, and 0.10 mol of Br2. If the system reaches equilibrium and the concentration of NOBr is found to be 0.075 M at that point, calculate the concentration of NO and Br2 at equilibrium.
asked
Jan 22
in
Chemical equilibrium
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1
answer
61
views
What are the main criticisms of the evolutionary perspective?
asked
Jan 20
in
Psychology
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1
answer
81
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According to the cognitive-neoassociation theory, why might someone who has just experienced a negative event be more likely to engage in aggressive behaviour?
asked
Jan 20
in
Psychology
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1
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89
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Where may the cognitive theory be critiqued?
asked
Jan 16
in
Psychology
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