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How does the size and shape of a nanoparticle affect its behavior in a molecular dynamics simulation? Specifically, how does the radius and aspect ratio of a gold nanoparticle impact its surface area and surface energy?
asked
Feb 24
in
Computational Chemistry
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votes
1
answer
31
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How does the presence of different functional groups affect the photophysical properties of organic molecules and how can this be utilized in designing novel light-emitting materials?
asked
Feb 22
in
Quantum Chemistry
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1
answer
34
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How does the pH of the solution affect the reaction rate of the enzymatic hydrolysis of sucrose using invertase enzyme?
asked
Feb 22
in
Chemical kinetics
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1
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34
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What is the optimum reaction conditions for the synthesis of polyethylene from ethylene monomer and how do they affect the yield and properties of the polymer?
asked
Feb 22
in
Chemical synthesis
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1
answer
28
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Which metal ion is present in the active site of the enzyme carbonic anhydrase and how does it assist in the catalytic conversion of carbon dioxide to bicarbonate ion?
asked
Feb 20
in
Coordination Chemistry
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votes
1
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34
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How does the folding pattern of a protein affect its function in the human body, and how do changes in the protein's environment impact its folding ability and ultimately its functionality?
asked
Feb 20
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BioChemistry
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1
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34
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What is the bond order of NO+ ion and NO− ion if the bond order of NO is calculated to be 2.5?
asked
Feb 18
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Chemical bonding
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1
answer
34
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What is the balanced chemical equation for the reaction between sulfuric acid (H2SO4) and sodium hydroxide (NaOH) to produce sodium sulfate (Na2SO4) and water (H2O)?
asked
Feb 17
in
Chemical reactions
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1
answer
30
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How does the arrangement of atoms in a crystal structure affect the physical properties of a material? Provide three specific examples of how crystallographic properties impact the behavior of materials in different chemical reactions.
asked
Feb 17
in
Physical Chemistry
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1
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41
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How does the absorption spectra of a molecule change with changes in its geometrical configuration? Use quantum chemical calculations to predict and explain the changes in the excited states of the molecule when its structure is altered.
asked
Feb 17
in
Computational Chemistry
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1
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34
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What is the effect of metal coordinative bonds on the adsorption properties of metal-organic frameworks used as adsorbents for gas separation applications, and how can computational studies help in predicting their optimal structures and properties?
asked
Feb 13
in
Computational Chemistry
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votes
1
answer
103
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How does the excess nitrogen and phosphorus in agricultural runoff affect the levels of dissolved oxygen in bodies of water and what methods can be used to mitigate these impacts?
asked
Feb 13
in
Environmental Chemistry
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1
answer
43
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How can the performance of polymer-based membranes for water treatment, specifically in terms of permeability and selectivity, be enhanced by varying the polymer composition, processing conditions, or surface modifications?
asked
Feb 10
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Polymer Chemistry
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1
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86
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Design a process for the purification of 500 grams of crude aspirin containing impurities such as acetic acid and sulfuric acid. The final product must have a purity of at least 99.5%. Describe the steps involved in the purification process, including the necessary equipment, reagents, and conditions for each step. Also, calculate the percent yield of the final product based on the initial mass of crude aspirin.
asked
Feb 4
in
Chemical engineering
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votes
1
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128
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A student needs to calculate the standard enthalpy change of combustion for propane using Hess's Law. They have the following information: C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l) ΔH° = -2220 kJ/mol 2H2(g) + O2(g) → 2H2O(l) ΔH° = -484 kJ/mol 3C(s) + 2H2(g) → C3H8(g) ΔH° = +51 kJ/mol What is the standard enthalpy change of combustion for propane?
asked
Jan 22
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ThermoChemistry
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1
answer
111
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What is the information processing theory in cognitive psychology?
asked
Jan 20
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Psychology
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1
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70
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How does the attribution theory explain how people perceive events?
asked
Jan 20
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Psychology
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1
answer
35
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When considering community psychology, what is the term for the process of involving stakeholders?
asked
Jan 20
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Psychology
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1
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100
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Who conducted the study on the mental health of Fly-in-fly-out partners?
asked
Jan 17
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Psychology
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1
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122
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Why is it important to understand the role of emotion in behaviour and mental processes?
asked
Jan 16
in
Psychology
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