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1
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What is the rate constant and mechanism for the reaction between ethylene and hydrogen at 298 K and 1 atm pressure, and how does the rate change when the temperature is increased to 373 K?
asked
3 days
ago
in
Quantum Chemistry
0
votes
1
answer
26
views
What is the mechanism of passivation on the surface of stainless steel and what factors influence its effectiveness in preventing corrosion?
asked
5 days
ago
in
Surface Chemistry
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votes
1
answer
22
views
What is the lowest energy transition of a molecule with a HOMO-LUMO gap of 3 eV and what is the corresponding wavelength of this transition?
asked
5 days
ago
in
Quantum Chemistry
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votes
1
answer
16
views
What is the effect of varying the cross-linking density on the swelling behavior of a superabsorbent polymer?
asked
5 days
ago
in
Polymer Chemistry
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votes
1
answer
27
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What is the effect of temperature on the adsorption of hydrogen gas on a solid surface of activated carbon? Provide experimental evidence to support your answer.
asked
6 days
ago
in
Surface Chemistry
0
votes
1
answer
28
views
How does the change in pH affect the rate of photochemical reaction in the presence of a photosensitizer?
asked
Feb 18
in
PhotoChemistry
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votes
1
answer
25
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How do the properties of surfactants, such as hydrophobicity and hydrophilicity, affect their ability to reduce surface tension in a liquid and increase the solubility of non-polar substances in water?
asked
Feb 17
in
Surface Chemistry
0
votes
1
answer
24
views
What is the difference between primary, secondary, and tertiary amines, and how does their basicity compare? Additionally, give an example of a common amine that is used in everyday products and explain its function.
asked
Feb 14
in
Organic Chemistry
0
votes
1
answer
41
views
How does the electronic structure of perovskite materials impact their optical properties, and how can quantum chemistry calculations be used to predict these properties?
asked
Feb 14
in
Quantum Chemistry
0
votes
1
answer
34
views
What is the effect of increasing the concentration of reactants on the rate of a chemical reaction?
asked
Feb 13
in
Chemical kinetics
0
votes
1
answer
34
views
How can the negative environmental impact of industrial waste disposal be minimized through chemical analysis and treatment methods?
asked
Feb 10
in
Environmental Chemistry
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votes
1
answer
40
views
Calculate the standard enthalpy of formation (ΔH°f) of methane (CH4) given the following data: 2H2(g) + O2(g) → 2H2O(l) ΔH°rxn = -572 kJ/mol C(graphite) + O2(g) → CO2(g) ΔH°rxn = -394 kJ/mol Note: The enthalpy of formation of an element in its standard state is zero (0).
asked
Feb 3
in
ThermoChemistry
0
votes
1
answer
50
views
How does changing the pH of a redox reaction affect the equilibrium position and what is the mathematical equation used to calculate the shift in equilibrium? Provide an example of a redox reaction and calculate the new equilibrium concentrations of the products and reactants when the pH is increased or decreased.
asked
Feb 3
in
Chemical equilibrium
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votes
1
answer
38
views
According to social identity theory, what is the in-group?
asked
Jan 20
in
Psychology
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votes
1
answer
34
views
Where was the first study on virtual reality exposure therapy conducted?
asked
Jan 20
in
Psychology
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votes
1
answer
30
views
According to the diathesis-stress model, what is the role of resilience in mental health?
asked
Jan 20
in
Psychology
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votes
1
answer
32
views
Who proposed the theory of positive psychology?
asked
Jan 20
in
Psychology
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votes
1
answer
81
views
What are the limitations of authority and obedience?
asked
Jan 16
in
Psychology
0
votes
1
answer
48
views
Where does pragmatism see the value of mixed methods?
asked
Jan 16
in
Psychology
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votes
1
answer
37
views
What is the peripheral nervous system?
asked
Jan 15
in
Psychology
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