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Questions by JoannKinne38
0
votes
1
answer
24
views
What is the predicted bond angle in a molecule of carbon dioxide (CO2)?
asked
3 days
ago
in
Chemical bonding
0
votes
1
answer
24
views
How do the photochemical properties of dyes and pigments affect their color and stability when exposed to sunlight?
asked
3 days
ago
in
PhotoChemistry
0
votes
1
answer
25
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How does the photochemical behavior differ between enantiomers of a chiral molecule and how can this difference be observed and studied experimentally?
asked
3 days
ago
in
PhotoChemistry
0
votes
1
answer
19
views
What is the overall ATP yield per glucose molecule metabolized in the citric acid cycle and oxidative phosphorylation? And how is this energy yield influenced by electron transport chain inhibitors?
asked
3 days
ago
in
BioChemistry
0
votes
1
answer
27
views
How does the molecular weight and branching of a polymer affect its suitability for use in 3D printing, and how can these properties be optimized for improved printing quality and mechanical strength of the printed object?
asked
4 days
ago
in
Materials Chemistry
0
votes
1
answer
5
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What is the effect of varying the oxidation state of the dopant on the electronic conductivity of conductive polymers, and how can this be optimized for use in flexible electronics?
asked
5 days
ago
in
Materials Chemistry
0
votes
1
answer
40
views
How does the concentration of the reactants affect the selectivity of a reaction in a chemical system?
asked
6 days
ago
in
Chemical kinetics
0
votes
1
answer
31
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How does the choice of metal catalyst affect the selectivity of hydrocarbon oxidation on metal surfaces?
asked
6 days
ago
in
Surface Chemistry
0
votes
1
answer
31
views
What are the differences between homogeneous and heterogeneous catalysis and how do they affect the reaction mechanism? Provide examples of each and explain the advantages and disadvantages of each type of catalysis.
asked
Feb 13
in
Physical Chemistry
0
votes
1
answer
29
views
How can the efficiency of polymer-based photovoltaic materials be enhanced by modifying the chemical structure of the polymer?
asked
Feb 7
in
Polymer Chemistry
0
votes
1
answer
36
views
Calculate the standard entropy change for the reaction below at a temperature of 298 K:CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) The standard molar entropies are as follows: S(CH4) = 186.3 J K^-1 mol^-1S(O2) = 205.0 J K^-1 mol^-1S(CO2) = 213.7 J K^-1 mol^-1S(H2O) = 188.8 J K^-1 mol^-1
asked
Feb 3
in
Chemical thermodynamics
0
votes
1
answer
31
views
Calculate the standard enthalpy change for the vaporization of 25.0 g of water at 100°C, given that the molar enthalpy of vaporization is 40.7 kJ/mol.
asked
Feb 3
in
Chemical thermodynamics
0
votes
1
answer
71
views
How effective are the Clean Air Act (CAA) regulations in reducing air pollution and improving air quality in the United States?
asked
Jan 31
in
Environmental Chemistry
0
votes
1
answer
8
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A cylinder with a volume of 2.5 L contains 1.5 moles of an ideal gas at a pressure of 5 atm. The gas is allowed to expand isothermally against a constant external pressure of 1 atm until the volume doubles. Calculate the work done by the gas during the expansion process.
asked
Jan 22
in
Physical Chemistry
0
votes
1
answer
53
views
A chemistry student wants to determine the effect of temperature on the ionization constant (Ka) of a weak acid. The initial Ka of the acid is 1.32 × 10^-6 at 25°C. If the temperature is increased to 35°C, calculate the new value of Ka for the weak acid.
asked
Jan 22
in
Chemical equilibrium
0
votes
1
answer
88
views
A chemistry student is investigating the surface area of activated carbon for an adsorption experiment. Using BET theory of multilayer adsorption, determine the specific surface area of the activated carbon based on the following data: - Mass of activated carbon used: 0.25g- Nitrogen adsorption at various pressures (in mmHg): - 6.523 - 9.785 - 13.092 - 19.638 - 31.725 - 45.200 - 61.587 - 84.632 - 114.684 - 147.087 Assume that the area occupied by one nitrogen molecule is 0.162 nm², and use the BET equation to calculate the specific surface area of the activated carbon material.
asked
Jan 22
in
Surface Chemistry
0
votes
1
answer
64
views
What is the pH of a 0.1 M solution of hydrochloric acid, assuming that the acid completely ionizes in water?
asked
Jan 21
in
Inorganic Chemistry
0
votes
1
answer
60
views
According to the dual-process model, what are the two processes that contribute to decision-making?
asked
Jan 20
in
Psychology
0
votes
1
answer
35
views
What is the difference between a decision and a judgement?
asked
Jan 17
in
Psychology
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votes
1
answer
25
views
How can we assess the scope and generality of psychodynamic theories?
asked
Jan 16
in
Psychology
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