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votes
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How does the presence of heavy metals such as lead and cadmium in soil affect plant growth, and what are the most effective methods for environmental remediation of contaminated sites with high levels of these metals?
answered
Feb 22
in
Environmental Chemistry
0
votes
28
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What is the optimal reaction conditions, including temperature and molar ratio, for the synthesis of nylon-6,6 from adipic acid and hexamethylenediamine to maximize yield and minimize side reactions?
answered
Feb 21
in
Chemical synthesis
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votes
39
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What is the effect of an increase in temperature on the ionization constant, Ka, of a weak acid with an initial concentration of 0.1 M and a pKa of 4.74? If the temperature is increased from 25°C to 35°C, what would be the new value for Ka?
answered
Feb 20
in
Chemical equilibrium
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votes
36
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How does the addition of a polymer plasticizer affect the compatibility of a blend of polystyrene and polyvinyl chloride?
answered
Feb 17
in
Polymer Chemistry
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votes
38
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How can we predict the selectivity and activity of a catalyst in a specific reaction using quantum chemistry calculations?
answered
Feb 14
in
Quantum Chemistry
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votes
13
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What is the oxidation state of nitrogen in NH4NO3?
answered
Feb 13
in
Chemical reactions
0
votes
71
views
How does eutrophication affect the concentration of dissolved oxygen in aquatic ecosystems and what are the consequences of low oxygen levels on the survival of aquatic organisms?
answered
Feb 13
in
Environmental Chemistry
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votes
49
views
What is the effect of different types of doping on the electronic and optical properties of perovskite materials, specifically those used in solar cells, and how do these changes impact the efficiency of the cells?
answered
Feb 12
in
Quantum Chemistry
0
votes
15
views
How can the synthesis method affect the electrochemical performance of a novel material for energy storage applications?
answered
Feb 11
in
Materials Chemistry
0
votes
38
views
How can chemistry teachers provide hands-on experiences to students in remote learning environments where in-person laboratory access is limited?
answered
Feb 6
in
Chemical education
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votes
50
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How can computational tools be used in molecular docking studies to identify potential drug molecules that can target specific proteins involved in disease pathways?
answered
Feb 5
in
Computational Chemistry
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45
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How can chemical educators better incorporate real-world applications of chemistry to increase students' interest in the subject?
answered
Feb 4
in
Chemical education
0
votes
82
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Calculate the standard enthalpy change for the phase transition reaction of solid iodine to iodine vapor using the following information:- Standard enthalpy of fusion of solid iodine = 15.52 kJ/mol- Standard enthalpy of vaporization of iodine = 41.57 kJ/mol- Heat capacity of solid iodine = 54.44 J/mol*K- Heat capacity of iodine vapor = 27.32 J/mol*K- Melting point of iodine = 386.85 K- Boiling point of iodine = 457.4 K
answered
Feb 3
in
Chemical thermodynamics
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votes
100
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How do changes in temperature affect the folding and stability of a specific protein structure? Use molecular dynamics simulations to analyze the role of temperature in the folding pathway and identify key structural changes that occur under different temperature conditions.
answered
Jan 31
in
Computational Chemistry
0
votes
70
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Calculate the heat of crystallization of NaOH given that 10 grams of NaOH dissolves in 100 mL of water at 25°C and the resulting solution is cooled to 0°C. The enthalpy of solution of NaOH is -44.5 kJ/mol, and the density of the resulting solution is 1.1 g/mL.
answered
Jan 23
in
ThermoChemistry
0
votes
43
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A researcher is working on the desorption of a specific gas from a metal surface. The enthalpy of desorption for this process is -23.4 kJ/mol. If the researcher desorbs 0.75 moles of the gas, how much heat is released (or absorbed)?
answered
Jan 22
in
ThermoChemistry
0
votes
65
views
According to Transformational Theory, how does a leader impact followers?
answered
Jan 20
in
Psychology
0
votes
57
views
How is the split-brain experiment conducted?
answered
Jan 20
in
Psychology
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votes
68
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When was the Milgram obedience study carried out?
answered
Jan 20
in
Psychology
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86
views
How do researchers evaluate theories in psychology?
answered
Jan 16
in
Psychology
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