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What changes occur in the performance and durability of polymer-based coatings and paints when different types of solvents and curing agents are used during the manufacturing process?
asked
Feb 22
in
Polymer Chemistry
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votes
1
answer
34
views
What is the mechanism behind the photochromic properties of materials and how can it be controlled to produce more efficient or responsive photochromic materials for a particular application?
asked
Feb 20
in
PhotoChemistry
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votes
1
answer
33
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What is the electronic structure and bonding analysis of a water molecule using Hartree-Fock method, and how does the formation of molecular orbitals contribute to the stability of the molecule?
asked
Feb 20
in
Quantum Chemistry
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votes
1
answer
32
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What is the critical micelle concentration (CMC) of Sodium Dodecyl Sulfate (SDS) in water, and what factors affect its value?
asked
Feb 19
in
Surface Chemistry
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votes
1
answer
34
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What is the bond energy of nitrogen gas in kilojoules per mole (kJ/mol) given that the N-N bond dissociation energy is 945 kJ/mol?
asked
Feb 18
in
Chemical reactions
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votes
1
answer
72
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How is the process of protein degradation and turnover regulated in cells via proteolytic enzymes? Specifically, how do these enzymes recognize targeted proteins and what are the mechanisms that control their activity?
asked
Feb 14
in
BioChemistry
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votes
1
answer
45
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How many ATP molecules are produced by one turn of the citric acid cycle and oxidative phosphorylation, given the input of one acetyl-CoA molecule into the cycle?
asked
Feb 14
in
BioChemistry
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votes
1
answer
31
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How does molecular weight affect the physical properties of polymers such as tensile strength and flexibility?
asked
Feb 13
in
Physical Chemistry
0
votes
1
answer
61
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How can we develop a novel drug delivery system for the treatment of respiratory diseases using targeted therapies?
asked
Feb 12
in
Medicinal Chemistry
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votes
1
answer
57
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How can the selectivity and permeability of polymer-based membranes for water treatment be enhanced to effectively remove contaminants such as heavy metals, organic compounds, and other pollutants from water sources?
asked
Feb 10
in
Polymer Chemistry
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votes
1
answer
68
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Calculate the standard enthalpy change for the following chemical reaction involving solutions:2HNO3(aq) + Ba(OH)2(aq) → Ba(NO3)2(aq) + 2H2O(l)Given the following information:ΔHf° [HNO3(aq)] = -207.5 kJ/molΔHf° [Ba(OH)2(aq)] = -994.0 kJ/molΔHf° [Ba(NO3)2(aq)] = -537.5 kJ/mol
asked
Feb 3
in
Chemical thermodynamics
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votes
1
answer
85
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Calculate the amount of heat absorbed by 50 grams of water during the process of crystallization when it is cooled from 70°C to 0°C and solidifies into ice with a heat of crystallization of 333.55 J/g.
asked
Jan 23
in
ThermoChemistry
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votes
1
answer
68
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Assuming standard conditions, calculate the standard enthalpy of combustion of methane (CH4), given that the standard enthalpies of formation of CH4 and H2O are -74.8 kJ/mol and -285.8 kJ/mol, respectively. The balanced chemical equation for the combustion of CH4 is:CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) What is the standard enthalpy change (ΔH°) for this reaction?
asked
Jan 22
in
ThermoChemistry
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1
answer
112
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A beaker of water is placed on a hot plate, and the temperature is gradually increased. Write an equation for the rate of change of entropy with respect to time during this process, assuming the system is not in equilibrium. Use the equation to determine the rate of entropy production in the water as it is heated from 25°C to 100°C at a constant rate of 2°C/min.
asked
Jan 22
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Physical Chemistry
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1
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54
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When was the concept of the confirmation bias introduced?
asked
Jan 20
in
Psychology
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votes
1
answer
47
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According to the illusory superiority bias, what do people tend to believe about themselves?
asked
Jan 20
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Psychology
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1
answer
30
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Why is it important to consider animal cognition when studying animal psychology?
asked
Jan 16
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Psychology
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votes
1
answer
148
views
What is the embodiment approach to artificial intelligence?
asked
Jan 15
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Psychology
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votes
1
answer
120
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What is the two-factor theory of emotion proposed by Schachter and Singer?
asked
Jan 15
in
Psychology
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1
answer
94
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What is the social-cognitive theory of mood disorders?
asked
Jan 14
in
Psychology
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