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1
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25
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How does pH affect the stability and size of silver nanoparticles in a colloidal solution?
asked
Feb 22
in
Physical Chemistry
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votes
1
answer
31
views
What is the coordination number and geometry of the metal ion in the active site of hemoglobin, a metalloprotein that carries oxygen in the blood? How does the coordination of the heme group with the iron ion contribute to the protein's function?
asked
Feb 20
in
Coordination Chemistry
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votes
1
answer
29
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How does the length and saturation of fatty acid chains in a lipid bilayer affect membrane structure and properties as observed through molecular dynamics simulations?
asked
Feb 20
in
Computational Chemistry
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votes
1
answer
24
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What is the effect of temperature on the rate of photochemical reactions that involve the isomerization of a molecule from the cis- to trans- configuration?
asked
Feb 20
in
PhotoChemistry
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votes
1
answer
32
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What effect does temperature have on the reaction rate and efficiency of the reaction between hydrochloric acid and sodium thiosulfate?
asked
Feb 17
in
Chemical kinetics
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votes
1
answer
33
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What are the key photochemical properties of photosensitive materials used in photography, and how do these properties determine the quality and characteristics of the final image produced?
asked
Feb 14
in
PhotoChemistry
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votes
1
answer
71
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Determine the standard enthalpy change of the precipitation reaction between aqueous solutions of copper (II) sulfate and calcium hydroxide, given that the reaction produces copper (II) hydroxide, solid calcium sulfate and water as the products. The initial concentrations of the solutions are 0.1 M for copper (II) sulfate and 0.05 M for calcium hydroxide, and the reaction takes place at constant pressure and temperature of 25°C.
asked
Feb 4
in
Chemical thermodynamics
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votes
1
answer
58
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Calculate the standard enthalpy change for the combustion of ethene gas (C2H4(g)) to form carbon dioxide gas (CO2(g)) and water vapor (H2O(g)), given the following thermochemical equations: C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g) ΔH°=-1411 kJ/mol2H2(g) + O2(g) → 2H2O(g) ΔH°=-484 kJ/mol
asked
Feb 3
in
Chemical thermodynamics
0
votes
1
answer
90
views
How does changing the concentration of reactants affect the rate of a reaction with a multi-step reaction mechanism?
asked
Feb 3
in
Chemical kinetics
0
votes
1
answer
97
views
What are the resonance structures of the molecule benzene? Include the correct placement of all pi-bonds and the formal charges on each atom in the structure.
asked
Jan 31
in
Chemical bonding
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votes
1
answer
76
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Calculate the equilibrium constant for the reaction that occurs when a copper electrode is placed in a solution of 0.1 M copper(II) sulfate and connected to a standard hydrogen electrode. The cell potential at standard conditions is observed to be 0.34 V. (Hint: Use the Nernst equation to relate the cell potential to the equilibrium constant.)
asked
Jan 23
in
ElectroChemistry
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1
answer
113
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A chemistry student needs to determine the enthalpy change for the reaction of nitrogen gas reacting with hydrogen gas to form ammonia gas, given that they have the following information:N2(g) + 3H2(g) --> 2NH3(g) ΔH1 = -92.4 kJ/mol2H2(g) + O2(g) --> 2H2O(l) ΔH2 = -572.0 kJ/molN2(g) + O2(g) --> 2NO(g) ΔH3 = +180.6 kJ/molUse Hess's law to calculate the enthalpy change for the reaction:2NH3(g) + 5O2(g) --> 2HNO3(aq) + 2H2O(l)
asked
Jan 22
in
Chemical reactions
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votes
1
answer
40
views
How can scarcity influence persuasion?
asked
Jan 20
in
Psychology
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votes
1
answer
70
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How can support groups aid in recovery?
asked
Jan 20
in
Psychology
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votes
1
answer
41
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Please list and explain the three types of research designs used in theory evaluation
asked
Jan 16
in
Psychology
0
votes
1
answer
53
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Where is the criterion of testability important in the theoretical models?
asked
Jan 16
in
Psychology
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votes
1
answer
60
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What is a durable power of attorney for health care?
asked
Jan 16
in
Psychology
0
votes
1
answer
58
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What is the role of same-sex parenting on gender development?
asked
Jan 15
in
Psychology
0
votes
1
answer
69
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What is the primary function of the limbic system?
asked
Jan 15
in
Psychology
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votes
1
answer
47
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What is the interaural time difference?
asked
Jan 14
in
Psychology
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