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Questions by IsabellaOcto
0
votes
1
answer
28
views
How does the photochemical nature of luminescent materials affect their emission properties?
asked
3 days
ago
in
PhotoChemistry
0
votes
1
answer
29
views
How does the intensity of light affect the rate of a chemical reaction involving potassium permanganate and oxalic acid?
asked
5 days
ago
in
Chemical kinetics
0
votes
1
answer
25
views
How does the composition of landfill leachate vary with time and what impact does this have on the quality of groundwater in the vicinity of the landfill?
asked
6 days
ago
in
Environmental Chemistry
0
votes
1
answer
34
views
What are the methods for measuring protein degradation and turnover rates in a biological system? In particular, how can the use of isotopic labeling and pulse-chase experiments be used to study the kinetics of protein turnover?
asked
Feb 14
in
BioChemistry
0
votes
1
answer
42
views
How does electrolyte concentration affect the colloidal stability and coagulation of a gold colloid? Provide experimental evidence to support your answer.
asked
Feb 13
in
Surface Chemistry
0
votes
1
answer
10
views
How can the synthesis of metal-organic frameworks be optimized to improve their stability and efficiency as catalysts for chemical reactions?
asked
Feb 11
in
Materials Chemistry
0
votes
1
answer
29
views
How can the adhesive strength of a polymer-based adhesive be improved for bonding plastics?
asked
Feb 6
in
Polymer Chemistry
0
votes
1
answer
35
views
How can a student calculate the bond order of the N2 molecule using molecular orbital theory, and what does the calculated bond order indicate about the stability and strength of the nitrogen-nitrogen bond in the molecule?
asked
Feb 4
in
Chemical bonding
0
votes
1
answer
37
views
Design a heat exchanger for a chemical plant which produces 1000 kg/hr of a chemical at a temperature of 350°C. The chemical needs to be cooled down to 50°C using water at an inlet temperature of 25°C. The cooling water flow rate should not exceed 5000 kg/hr. The overall heat transfer coefficient should be at least 500 W/m2K. Determine the surface area of the heat exchanger required for this process.
asked
Feb 4
in
Chemical engineering
0
votes
1
answer
60
views
Calculate the standard electrode potential of the half-cell reaction Ag+ + e- → Ag, given that the standard reduction potential of Ag+ is 0.80 V.
asked
Feb 3
in
ElectroChemistry
0
votes
1
answer
35
views
Calculate the rate of electroplating of copper on a metallic surface at a current of 2.5 amperes for a duration of 3 hours using a copper nitrate solution with a concentration of 0.2 M. Given that the standard potential of the reduction reaction of Cu2+ to Cu is +0.34 V and the charge of one mole of electrons is 96500 C/mol.
asked
Feb 3
in
ElectroChemistry
0
votes
1
answer
67
views
How does the accumulation of ceramides contribute to insulin resistance and Type 2 Diabetes Mellitus in lipid metabolism?
asked
Jan 31
in
BioChemistry
0
votes
1
answer
62
views
What is the calculated vibrational frequency of the carbon-oxygen double bond in the molecule ethylene oxide, and how does this frequency compare to the corresponding frequency for a single carbon-oxygen bond? Use quantum chemical calculations to determine the infrared spectra for both bonds, and explain the differences in the spectra.
asked
Jan 31
in
Quantum Chemistry
0
votes
1
answer
62
views
Calculate the enthalpy change for the combustion of 2 moles of methane gas (CH4) at constant pressure, given that the standard enthalpy of formation (ΔHf) of methane gas is -74.8 kJ/mol. Express your answer in kilojoules (kJ).
asked
Jan 23
in
Chemical thermodynamics
0
votes
1
answer
59
views
Calculate the bond energy of O2 molecule in kJ/mol, given that the bond energy of O-H is 464 kJ/mol and the bond energy of H-H is 432 kJ/mol.
asked
Jan 23
in
Chemical reactions
0
votes
1
answer
64
views
Calculate the bond energy of carbon-hydrogen bond in methane (CH4) given that the enthalpy change of combustion for methane is -890 kJ/mol and the enthalpy change for breaking carbon-hydrogen bonds is 413 kJ/mol.
asked
Jan 23
in
Chemical reactions
0
votes
1
answer
63
views
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
0
votes
1
answer
34
views
Who developed the t-test?
asked
Jan 20
in
Psychology
0
votes
1
answer
51
views
What is the information social influence theory by Muzafer Sherif?
asked
Jan 20
in
Psychology
0
votes
1
answer
48
views
What is the purpose of the Raven's Progressive Matrices test?
asked
Jan 20
in
Psychology
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