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votes
1
answer
31
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What is the most efficient method to produce adhesive materials with improved bonding properties while minimizing energy consumption and reducing waste in the production process?
asked
Feb 21
in
Chemical engineering
0
votes
1
answer
35
views
What is the melting point of a sample of aspirin obtained from a drugstore, and how does it compare to the melting point of pure aspirin? Can the purity of the sample be determined from the melting point data?
asked
Feb 20
in
Analytical Chemistry
0
votes
1
answer
27
views
How does the degree of conjugation affect the electronic and optical properties of a polymer, and how can this be accurately calculated using quantum chemistry methods?
asked
Feb 19
in
Quantum Chemistry
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votes
1
answer
38
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What is the activation energy for the electrochemical reaction between zinc and hydrochloric acid at room temperature?
asked
Feb 17
in
ElectroChemistry
0
votes
1
answer
36
views
How can we predict the absorption spectra of a molecule using quantum chemical calculations of excited states?
asked
Feb 14
in
Computational Chemistry
0
votes
1
answer
40
views
How can we optimize the design and properties of drug delivery systems to enhance the bioavailability, targeting, and therapeutic efficacy of a drug?
asked
Feb 14
in
Medicinal Chemistry
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votes
1
answer
54
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What is the balanced chemical equation for the redox reaction that occurs between potassium permanganate (KMnO₄) and hydrogen peroxide (H₂O₂) in acidic solution?
asked
Feb 13
in
Chemical reactions
0
votes
1
answer
67
views
What is the impact of heavy metal contamination on the population of fish in a particular water body and what methods can be used to mitigate this pollution?
asked
Feb 13
in
Environmental Chemistry
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votes
1
answer
66
views
What is the heat of hydration of magnesium sulfate, MgSO4, when 45 grams of the anhydrous salt is dissolved in 250 mL of water? The molar heat of hydration of MgSO4 is -138.5 kJ/mol.
asked
Feb 13
in
ThermoChemistry
0
votes
1
answer
33
views
How can the efficiency of solar cells be improved by synthesizing and characterizing new materials with desired properties such as high light absorption, charge separation, and transport?
asked
Feb 7
in
Materials Chemistry
0
votes
1
answer
74
views
Determine the standard electrode potential, given that the standard reduction potential for the half-reaction, Ag+ (aq) + e- → Ag(s) is +0.80 V and the standard oxidation potential for the half-reaction, Fe(s) → Fe2+(aq) + 2e-, is -0.44 V. Using this information, predict whether or not the reaction Ag(s) + Fe2+(aq) → Fe(s) + Ag+(aq) will occur spontaneously under standard conditions.
asked
Feb 4
in
Chemical thermodynamics
0
votes
1
answer
67
views
Calculate the standard enthalpy of formation of methanol, CH3OH (l), given that the standard enthalpy of combustion of methanol is -726.4 kJ/mol and the standard enthalpy of formation of carbon dioxide and water are -393.5 kJ/mol and -285.8 kJ/mol, respectively.
asked
Feb 3
in
ThermoChemistry
0
votes
1
answer
82
views
What is the effect of changing the anion of an ionic liquid on its physical properties?
asked
Jan 31
in
Physical Chemistry
0
votes
1
answer
93
views
What strategies should a student implement to better prepare for chemistry exams and increase their chances of success?
asked
Jan 30
in
Chemical education
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votes
1
answer
19
views
How can the concentration of a hydrochloric acid solution be determined using sodium hydroxide as the titrant? What volume of a 0.2 M NaOH solution is needed to neutralize 25 mL of 0.1 M HCl solution?
asked
Jan 29
in
Analytical Chemistry
0
votes
1
answer
94
views
Calculate the magnetic susceptibility (in cm3 mol-1) of a molecule with the following quantum numbers: S=1, L=2, and J=3/2 in the presence of an external magnetic field of 0.5 T.
asked
Jan 23
in
Quantum Chemistry
0
votes
1
answer
82
views
Calculate the enthalpy change of solution for 5.00 g of ammonium chloride (NH4Cl) dissolved in 50.0 mL of water, given that the temperature of the solution decreases by 4.21°C. The density of water is 1.00 g/mL and the specific heat capacity of the solution is 4.18 J/g°C. The molar mass of ammonium chloride is 53.49 g/mol.
asked
Jan 23
in
ThermoChemistry
0
votes
1
answer
86
views
What is the central concept of the humanist approach?
asked
Jan 20
in
Psychology
0
votes
1
answer
33
views
Why is implicit bias a concern in psychology?
asked
Jan 17
in
Psychology
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votes
1
answer
35
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According to the cognitive-behavioural theory, what is cognitive restructuring?
asked
Jan 15
in
Psychology
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