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0
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33
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How does the level of nutrient concentration affect the growth and population dynamics of algae and other aquatic plants in a eutrophic lake?
answered
5 days
ago
in
Environmental Chemistry
0
votes
28
views
How does the electronic structure of a material vary with changes in its chemical composition? Use density functional theory calculations to explain the changes in electronic properties of a series of materials with varying compositions.
answered
5 days
ago
in
Computational Chemistry
0
votes
29
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What is the effect of varying reactant concentrations on the reaction rate and efficiency in the chemical reaction between hydrochloric acid and sodium thiosulfate, and how can this be explained using the collision theory?
answered
5 days
ago
in
Chemical kinetics
0
votes
27
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What is the effect of varying the cross-linking density on the water absorbency and swelling behavior of polymer-based superabsorbent materials?
answered
6 days
ago
in
Polymer Chemistry
0
votes
26
views
How does the concentration of reactants affect the rate of the chemical reaction and the overall sustainability of the reaction?
answered
6 days
ago
in
Chemical kinetics
0
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31
views
What spectroscopic techniques can be used to determine the geometry of a coordination compound? Provide specific examples and explain how they work.
answered
Feb 14
in
Coordination Chemistry
0
votes
33
views
How can we predict the electronic and magnetic properties of metal-organic frameworks using quantum chemistry calculations?
answered
Feb 14
in
Quantum Chemistry
0
votes
8
views
How can the production process for nitrogen gas be optimized for cost-efficiency and reduced environmental impacts in an industrial setting?
answered
Feb 10
in
Chemical engineering
0
votes
33
views
How can the compatibility between two different polymers in a blend be improved?
answered
Feb 6
in
Polymer Chemistry
0
votes
46
views
How do different types of amino acid side chains interact with the DNA bases and affect DNA-protein interactions and regulation? Provide detailed examples and explanations of the chemical mechanisms involved in these interactions.
answered
Jan 31
in
BioChemistry
0
votes
74
views
What is the effect of adding a catalyst on the equilibrium position of a redox reaction in which the products have a higher number of moles than the reactants? Provide a numerical example to support your answer.
answered
Jan 30
in
Chemical equilibrium
0
votes
76
views
What is the concentration of copper sulfate in a solution that has an absorbance of 0.332 at a wavelength of 630 nm, given that the molar absorptivity of copper sulfate is 8.8 x 10^3 L/(mol cm)?
answered
Jan 30
in
Analytical Chemistry
0
votes
92
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Identify the unknown compound X using mass spectrometry data given below. The molecular ion peak of X is observed at m/z 120 with a relative intensity of 100%. Additionally, the following fragment peaks with their respective relative intensities were also observed: m/z 105 (40%), m/z 92 (15%), m/z 77 (10%), and m/z 65 (5%). What is the molecular formula of X and what is its structural formula?
answered
Jan 30
in
Analytical Chemistry
0
votes
52
views
How can we analyze the protein composition of a sample using electrophoresis and determine the relative quantity of each protein present?
answered
Jan 29
in
Analytical Chemistry
0
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61
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Calculate the Gibbs free energy change at 25°C for the reaction:2NO(g) + O2(g) → 2NO2(g)Given the standard Gibbs free energy of formation at 25°C for NO(g), O2(g), and NO2(g) are +86.4 kJ/mol, 0 kJ/mol, and +51.3 kJ/mol, respectively.
answered
Jan 23
in
Chemical thermodynamics
0
votes
73
views
Calculate the enthalpy of polymerization for the reaction of ethylene (C2H4) to polyethylene (C2H4)n, given that the enthalpy of combustion for ethylene is -1411 kJ/mol and the number of moles of ethylene used in the reaction is 4.5 mol. Assume that the reaction is exothermic and that the enthalpy change is constant over the extent of the reaction.
answered
Jan 23
in
ThermoChemistry
0
votes
67
views
A metal electrode immersed in a solution is used to convert a chemical reaction into an electric current. The electrode potential is measured as the voltage difference between the metal and the solution. The cathodic and anodic Tafel slopes are then calculated in order to determine the rate of the chemical reaction occurring at the electrode. Given a metal electrode immersed in a 0.1 M solution of AgNO3, the cathodic and anodic Tafel slopes are determined to be 120 mV/decade and 110 mV/decade, respectively. Calculate the exchange current density for the reaction occurring at the electro
answered
Jan 22
in
ElectroChemistry
0
votes
75
views
When was the Tuskegee Syphilis Study conducted?
answered
Jan 20
in
Psychology
0
votes
41
views
Why is the Milgram experiment controversial?
answered
Jan 20
in
Psychology
0
votes
34
views
When did community psychology emerge?
answered
Jan 17
in
Psychology
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