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How does the size and shape of a nanomaterial affect its electronic and optical properties, and how can we calculate these properties using quantum chemistry methods?
answered
1 day
ago
in
Quantum Chemistry
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votes
21
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What is the relationship between the concentration of reactants and the reaction rate in the reaction of hydrogen peroxide and iodide ions, and how does this affect the overall reaction efficiency?
answered
3 days
ago
in
Chemical kinetics
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votes
13
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What is the balanced chemical equation for the preparation of 2,4-dinitrobenzoic acid from benzoic acid and nitric acid?
answered
3 days
ago
in
Chemical synthesis
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votes
32
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How do the photochemical properties of a fluorescent dye, such as its absorption and emission spectra and quantum yield, affect its performance in fluorescence microscopy applications?
answered
3 days
ago
in
PhotoChemistry
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votes
25
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What is the mechanism of photoinduced electron transfer in a dye-sensitized solar cell, and what factors affect its efficiency?
answered
5 days
ago
in
Physical Chemistry
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votes
27
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What are the mechanisms behind the photochemical properties of silver halides and how do these properties make them suitable for use in photographic films and papers?
answered
Feb 14
in
PhotoChemistry
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votes
24
views
What are the major sources of radioactive waste and what impact they have on the environment? How can we design effective methods for the safe disposal of radioactive waste without harming the environment?
answered
Feb 13
in
Environmental Chemistry
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votes
29
views
What is the fundamental difference between infrared spectroscopy and Raman spectroscopy in probing molecular vibrations? Provide a detailed explanation using examples of the types of molecular motions each technique can detect.
answered
Feb 13
in
Physical Chemistry
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votes
36
views
What is the net ATP production in the process of glycolysis and gluconeogenesis? How do the two pathways differ in terms of energy consumption and synthesis?
answered
Feb 13
in
BioChemistry
0
votes
26
views
What is the structural difference between cis-platin and trans-platin, and how does this difference affect their biological activity as chemotherapy agents?
answered
Feb 12
in
Coordination Chemistry
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votes
9
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How can chemistry students be better prepared for chemistry-related careers to effectively apply their education and skills to real-world situations?
answered
Feb 4
in
Chemical education
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votes
34
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How can chemistry educators improve safety protocols in labs and make it a priority in their teaching methods to prevent accidents and injuries?
answered
Feb 4
in
Chemical education
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votes
44
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Consider the following chemical reaction: 2H2(g) + O2(g) ⇌ 2H2O(g)At a certain temperature and pressure, the partial pressures of H2, O2, and H2O are found to be 0.20 atm, 0.10 atm, and 0.80 atm, respectively. Calculate the reaction quotient (Qc) for this reaction at this temperature and pressure. Is the system at equilibrium? If not, in which direction will the reaction proceed to attain equilibrium?
answered
Feb 3
in
Chemical thermodynamics
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votes
55
views
What is the contribution of carbon dioxide (CO2) to the greenhouse effect and global warming, and how does the concentration of CO2 in the atmosphere affect the planet's climate?
answered
Jan 31
in
Environmental Chemistry
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votes
11
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Calculate the formal charge of the nitrogen atom in the molecule NH3. Show your work and explain the significance of the result.
answered
Jan 23
in
Chemical bonding
0
votes
55
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Calculate the enthalpy change for the combustion of methane at standard conditions, given the following information:- The enthalpy of formation of CO2(g) is -393.5 kJ/mol.- The enthalpy of formation of H2O(g) is -241.8 kJ/mol.- The enthalpy of formation of CH4(g) is -74.8 kJ/mol.
answered
Jan 23
in
Chemical reactions
0
votes
10
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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
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votes
37
views
According to the Self-Regulation Theory, how can individuals regulate their emotions when facing end-of-life challenges?
answered
Jan 20
in
Psychology
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votes
29
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How did Pavlov's dog experiment demonstrate classical conditioning?
answered
Jan 20
in
Psychology
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votes
54
views
Where might a clinical psychologist look for the cause of borderline personality disorder?
answered
Jan 17
in
Psychology
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