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1
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What is the optimum temperature and concentration of nitric acid needed to achieve a high yield in the preparation of 2,4,6-trinitrotoluene from toluene?
asked
4 days
ago
in
Chemical synthesis
0
votes
1
answer
26
views
How does the intensity of light affect the rate of a specific photochemical reaction, and what is the mechanism behind this phenomenon?
asked
5 days
ago
in
PhotoChemistry
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votes
1
answer
27
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What is the dipole moment of the water molecule, and how does it change when a fluoride ion replaces one of the hydrogen atoms? Use ab initio calculations to determine the dipole moments of both molecules and compare the results.
asked
6 days
ago
in
Computational Chemistry
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votes
1
answer
23
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How does the absorption of light by a molecule or material affect its electronic structure and chemical reactivity?
asked
Feb 17
in
Quantum Chemistry
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votes
1
answer
42
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How does the surface tension of biomembranes affect the diffusion and absorption of small molecules and nutrients through the cell membrane?
asked
Feb 17
in
Surface Chemistry
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1
answer
27
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How can the synthesis of polymer-based superabsorbent materials be optimized to increase their water absorbing capacity and retention time?
asked
Feb 11
in
Polymer Chemistry
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1
answer
38
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How can the processing conditions (e.g. temperature, pressure, shear rate) be optimized to improve the mechanical properties (e.g. ductility, strength) of a specific polymer during its manufacturing process?
asked
Feb 10
in
Polymer Chemistry
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votes
1
answer
43
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How can the principles of quantum mechanics be applied to develop efficient algorithms for quantum computers, and what impact could this have on the field of chemistry, particularly in the areas of molecular modeling and simulation?
asked
Feb 10
in
Quantum Chemistry
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votes
1
answer
84
views
What is the concentration of heavy metals and organic pollutants in landfill leachate samples and how do they affect the quality of the groundwater in the surrounding area?
asked
Jan 31
in
Environmental Chemistry
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votes
1
answer
80
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What is the effect of temperature on the phase transition of water from liquid to solid using Monte Carlo simulations?
asked
Jan 31
in
Computational Chemistry
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votes
1
answer
76
views
How effective are the current environmental regulations in protecting aquatic life from chemical pollutants in bodies of water?
asked
Jan 31
in
Environmental Chemistry
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votes
1
answer
59
views
What is the difference between an ether and an epoxide in terms of their structures and reactivity with nucleophiles? Provide examples of each and explain how their unique structures affect their reactivity.
asked
Jan 31
in
Organic Chemistry
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1
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70
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A chemistry student was given a sample of a white crystalline substance, suspected to be a mixture of sodium chloride (NaCl) and potassium chloride (KCl). The student performed an analysis and found that the sample contained 64% chlorine by mass. Calculate the mass percentage of sodium chloride and potassium chloride present in the mixture.
asked
Jan 22
in
Analytical Chemistry
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1
answer
59
views
A 1.00 gram sample of sucrose (C12H22O11) is completely hydrolyzed in solution with excess HCl. If the solution is cooled to room temperature, what is the change in enthalpy ($\Delta H$) for the reaction? The heat capacity of the solution is 4.18 J/(g*K) and the temperature change is -10°C.
asked
Jan 22
in
ThermoChemistry
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votes
1
answer
106
views
How many moles of sulfuric acid (H2SO4) are required to react completely with 5 moles of magnesium hydroxide (Mg(OH)2) to produce magnesium sulfate (MgSO4) and water (H2O)?
asked
Jan 21
in
Inorganic Chemistry
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votes
1
answer
23
views
Who proposed the triarchic theory of intelligence?
asked
Jan 20
in
Psychology
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1
answer
24
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How do cognitive processes such as attention and memory impact behaviour?
asked
Jan 16
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Psychology
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votes
1
answer
38
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Why is it important to avoid biological essentialism in gender psychology?
asked
Jan 16
in
Psychology
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1
answer
57
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According to the humanistic psychology approach, what is the main driver of human behaviour?
asked
Jan 16
in
Psychology
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1
answer
65
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According to the authoritarian personality theory, what is the role of personality in prejudice?
asked
Jan 16
in
Psychology
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