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What is the most effective analytical method to determine pesticide residues in food samples and how do these residues affect human health over a long period of time?
asked
4 days
ago
in
Environmental Chemistry
0
votes
1
answer
31
views
How does the molecular structure of polymer-based photovoltaic materials affect their efficiency in converting solar energy into electrical energy?
asked
4 days
ago
in
Polymer Chemistry
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1
answer
28
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What is the effect of activated carbon particle size on the adsorption of toxic gas pollutants from air?
asked
5 days
ago
in
Surface Chemistry
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votes
1
answer
18
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What is the coordination number of iron in the heme group of myoglobin?
asked
6 days
ago
in
Coordination Chemistry
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votes
1
answer
34
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How can we use phytoremediation to clean up a contaminated site with high levels of heavy metals and organic pollutants?
asked
Feb 14
in
Environmental Chemistry
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1
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36
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What is the reaction mechanism and intermediate involved in the synthesis of ethyl acetate through Fischer esterification?
asked
Feb 13
in
Organic Chemistry
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votes
1
answer
33
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How can we enhance the luminescent properties of a material through photochemical modification?
asked
Feb 13
in
PhotoChemistry
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1
answer
10
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How can we design novel antiviral agents that target viral enzymes with high specificity and potency, but have minimal off-target effects on host cell proteins?
asked
Feb 12
in
Medicinal Chemistry
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votes
1
answer
51
views
How can the production of high-quality polyvinyl alcohol from vinyl acetate monomer be optimized through control of reaction conditions such as temperature, pressure, pH, and initiator amount?
asked
Feb 10
in
Chemical synthesis
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votes
1
answer
32
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How can the magnetic properties of a material such as iron oxide nanoparticles be optimized for use in high-density data storage applications?
asked
Feb 7
in
Materials Chemistry
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votes
1
answer
25
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How can the conductivity of conductive polymers be optimized to improve the efficiency of flexible electronic devices?
asked
Feb 6
in
Materials Chemistry
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votes
1
answer
45
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How can knowledge of a patient's genetic makeup assist in determining the personalized dose and response to a specific drug in the treatment of cancer?
asked
Feb 5
in
Medicinal Chemistry
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votes
1
answer
33
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How can chemistry teachers provide better support for students with learning disabilities in order to help them understand complex chemical concepts and perform well in exams?
asked
Feb 5
in
Chemical education
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votes
1
answer
92
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What type of bond is likely to form between a sulfur atom and a chlorine atom, and how is it determined?
asked
Jan 30
in
Chemical bonding
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votes
1
answer
59
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Calculate the enthalpy change of oxidation for the combustion of 1 mole of ethane gas (C₂H₆) in oxygen gas (O₂) to form carbon dioxide gas (CO₂) and water vapor (H₂O), given the following enthalpies of formation: ΔHf(C₂H₆) = -84.7 kJ/mol, ΔHf(CO₂) = -393.5 kJ/mol, ΔHf(H₂O) = -241.8 kJ/mol.
asked
Jan 23
in
ThermoChemistry
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votes
1
answer
64
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Calculate the enthalpy change for the polymerization of 2-methyl-1,3-butadiene (MBC) if 1 mole of MBC is polymerized in a perfectly insulated container at a constant temperature of 25°C. The reaction equation for the polymerization of MBC is given as:nC5H8 (MBC) → (C5H8) (Polymer)Given the bond dissociation energies (in kJ/mol) for the following bonds:C-C bond = 348C-H bond = 413Assume that the enthalpy change of vaporization of MBC is negligible.
asked
Jan 23
in
ThermoChemistry
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1
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82
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A Chemistry student is trying to determine the effect of changing the volume on the equilibrium position of a chemical reaction at constant temperature. If the reaction is initially in equilibrium in a 1 L container with a concentration of [X] = 0.10 M and [Y] = 0.20 M, and then the volume is decreased to 0.4 L, what will be the new equilibrium concentrations of X and Y at the new volume?
asked
Jan 22
in
Chemical equilibrium
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votes
1
answer
42
views
How does social identity affect an individual's self-esteem?
asked
Jan 17
in
Psychology
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votes
1
answer
34
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What is the role of cortisol in stress?
asked
Jan 17
in
Psychology
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votes
1
answer
22
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Where should we look when evaluating the practical utility of theories in organisational psychology?
asked
Jan 16
in
Psychology
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