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User NicholeBlade
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votes
1
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81
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How does the presence of a double bond affect the electrophilic addition reaction of an alkene with hydrogen bromide, and what is the mechanism behind this reaction?
asked
Feb 22
in
Organic Chemistry
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votes
1
answer
83
views
What is the optimal reaction conditions, including temperature, pressure, and catalyst selection, for the synthesis of polyethylene oxide with a targeted molecular weight using ethylene oxide as the monomer?
asked
Feb 21
in
Chemical synthesis
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votes
1
answer
75
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How does the mechanism of action of a chosen drug in the body affect its therapeutic effectiveness and potential side effects? Provide a detailed explanation using relevant pharmacodynamic principles and examples.
asked
Feb 20
in
Medicinal Chemistry
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votes
1
answer
73
views
What is the mechanism behind the ability of detergents to remove oil and grease from surfaces?
asked
Feb 20
in
Surface Chemistry
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votes
1
answer
77
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What is the effect of different wavelengths of light on the reaction rate of a chemical reaction, specifically the reaction between iodine and acetone?
asked
Feb 19
in
Chemical kinetics
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1
answer
66
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How does the coordination of metal ions with specific amino acid residues affect the activity and stability of metalloproteins/enzymes?
asked
Feb 19
in
Coordination Chemistry
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1
answer
94
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How does the concentration of heavy metals, such as lead and mercury, vary in different environmental compartments (air, water, soil, and living organisms) and how does this affect their toxicity and potential impact on human health and the environment?
asked
Feb 19
in
Environmental Chemistry
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votes
1
answer
82
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How does temperature affect the activity of the enzyme α-amylase in breaking down starch into maltose?
asked
Feb 17
in
BioChemistry
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votes
1
answer
134
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How do the ionic properties of ILs affect their potential use as solvents, electrolytes and catalysts in chemical reactions?
asked
Feb 13
in
Physical Chemistry
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votes
1
answer
178
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What is the oxidation state of sulfur in the compound Na2SO4?
asked
Feb 13
in
ElectroChemistry
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1
answer
126
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What is the hybridization of the central atom in the molecule sulfur hexafluoride (SF6)?
asked
Feb 13
in
Inorganic Chemistry
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votes
1
answer
108
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How do the photochemical properties of enantiomers differ from each other and what are the possible applications of these differences in various industries such as pharmaceuticals, food science, and agriculture?
asked
Feb 13
in
PhotoChemistry
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votes
1
answer
77
views
How can we design a new drug molecule that effectively reduces inflammation in the body without causing harmful side effects?
asked
Feb 12
in
Medicinal Chemistry
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votes
1
answer
82
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How can the photochemical properties of enantiomers be differentiated and characterized?
asked
Feb 10
in
PhotoChemistry
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votes
1
answer
94
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How can medicinal chemists develop new treatments for autoimmune diseases that target the immune system specifically without affecting other healthy cells?
asked
Feb 5
in
Medicinal Chemistry
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votes
1
answer
159
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Given a reaction with the following data, calculate the rate constant (k) of the reaction:2 A + 3 B → CAt a particular temperature, the initial concentration of A was 0.2 M and the initial concentration of B was 0.5 M. After 30 minutes, the concentration of A decreased to 0.1 M while the concentration of B decreased to 0.3 M. The reaction is second order with respect to A and first order with respect to B.
asked
Feb 4
in
Chemical kinetics
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votes
1
answer
135
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Calculate the standard enthalpy change for the phase transition reaction of solid calcium carbonate (CaCO3) to gaseous carbon dioxide (CO2) at 298 K, given the following formation enthalpies: ΔHf°(CaCO3) = -1206.9 kJ/mol ΔHf°(CO2) = -393.5 kJ/mol Also, assume that the specific heat capacity of CaCO3 is 0.82 J/g·K and that of CO2 is 0.85 J/g·K.
asked
Feb 3
in
Chemical thermodynamics
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votes
1
answer
141
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How can a student determine which areas of chemistry they need additional preparation in, in order to improve their performance on exams?
asked
Jan 30
in
Chemical education
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votes
1
answer
92
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Calculate the enthalpy change for the polymerization of polyethylene using the following information: ΔHf° of ethylene (-20.4 kJ/mol) and polyethylene (-1024 kJ/mol); the reaction equation: nC2H4 (g) → [-CH2-CH2-]n (s)
asked
Jan 23
in
ThermoChemistry
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votes
1
answer
47
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What does the cognitive-behavioural model suggest about the relationship between delusions and anxiety?
asked
Jan 20
in
Psychology
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