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votes
1
answer
59
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How do the properties of the polymer coating, such as adhesion, hardness, and scratch resistance, affect its performance in protecting surfaces from environmental factors like UV radiation, water exposure, and corrosive materials?
asked
Feb 22
in
Polymer Chemistry
0
votes
1
answer
33
views
What is the polarity of the bond between nitrogen and chlorine in the molecule NCl3?
asked
Feb 22
in
Chemical bonding
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votes
1
answer
36
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How does the photochemical behavior of supramolecular assemblies differ from that of individual molecules, and what factors influence this difference?
asked
Feb 22
in
PhotoChemistry
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votes
1
answer
36
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How does the photochemical behavior differ between natural and synthetic dyes in terms of their ability to withstand UV radiation?
asked
Feb 22
in
PhotoChemistry
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votes
1
answer
32
views
What is the percent yield of a chemical reaction when 5 grams of reactant A reacted with excess reactant B to produce 3.5 grams of product C, given that the theoretical yield of C is 4 grams?
asked
Feb 22
in
Chemical reactions
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votes
1
answer
30
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How do the functional groups present in biomolecules like proteins and nucleic acids dictate their unique properties and functions in living systems?
asked
Feb 20
in
Organic Chemistry
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1
answer
27
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What is the effect of temperature on the adsorption of nitrogen gas on a solid surface? Provide experimental evidence to support your answer.
asked
Feb 20
in
Surface Chemistry
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votes
1
answer
40
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How does the catalytic activity of enzymes change when the temperature and pH of the reaction environment are altered, as determined through computational modeling and simulation?
asked
Feb 18
in
Computational Chemistry
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votes
1
answer
37
views
What is the bond order of a nitrogen molecule (N2) and an oxygen molecule (O2) based on their molecular orbital diagrams and how does this relate to their bond strength and bond length?
asked
Feb 18
in
Chemical bonding
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votes
1
answer
34
views
How do the chemicals and pollutants present in air, such as sulfur dioxide and nitrogen oxides, contribute to respiratory health problems in humans and what can be done to minimize their impact?
asked
Feb 14
in
Environmental Chemistry
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votes
1
answer
41
views
How does the process of protein degradation and turnover occur in a cell and what are the specific mechanisms involved in the breakdown of various types of proteins, including enzymes and structural proteins, in both normal and aberrant conditions?
asked
Feb 14
in
BioChemistry
0
votes
1
answer
93
views
What type of hybridization occurs in the molecule of methane (CH4)?
asked
Feb 13
in
Chemical bonding
0
votes
1
answer
45
views
How does changing the concentration of reactants affect the rate of a second-order reaction? Provide an experimental design to determine the reaction order and rate constant for a given chemical reaction.
asked
Feb 13
in
Chemical kinetics
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votes
1
answer
47
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How does coordination of transition metal ions in metalloproteins affect their function? Provide at least two examples and explain the role of the metal ion in each case.
asked
Feb 12
in
Coordination Chemistry
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votes
1
answer
37
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How can the production process of adhesives be optimized to reduce waste and increase efficiency while maintaining the desired properties of the final product?
asked
Feb 10
in
Chemical engineering
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votes
1
answer
38
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How can the photochemical properties of luminescent materials be tuned to improve their efficiency for potential use in optoelectronic devices such as solar cells?
asked
Feb 10
in
PhotoChemistry
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votes
1
answer
91
views
For the electrochemical reaction + ↔ + , the cell potential is 0.60 V at 25°C. If the standard reduction potential of 2+ is 0.34 V and that of 2+ is -0.74 V, calculate the equilibrium constant () for the reaction at 25°C.
asked
Feb 4
in
ElectroChemistry
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votes
1
answer
35
views
Determine the equilibrium constant at room temperature for the reaction of hydrogen gas and iodine gas to form hydrogen iodide gas, if the initial concentrations of hydrogen and iodine gases were 0.50 M and 0.25 M, respectively, and the equilibrium concentration of hydrogen iodide gas is 0.40 M.
asked
Feb 4
in
Chemical equilibrium
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votes
0
answers
122
views
What specific steps can be taken by universities and colleges to better prepare chemistry students for their future careers in the chemical industry, where practical skills are just as important as theoretical knowledge?
asked
Jan 30
in
Chemical education
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votes
1
answer
90
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A student needs to find the enthalpy of polymerization of ethylene from the enthalpies of combustion of ethylene gas (-1411 kJ/mol) and polyethylene (-5120 kJ/mol). Calculate the enthalpy change, in kJ/mol, for the polymerization of ethylene gas to form polyethylene.
asked
Jan 22
in
ThermoChemistry
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