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What are the main mechanisms of antibacterial drug resistance in gram-positive bacteria, and how can medicinal chemists develop new antibiotics to combat these mechanisms?
asked
Feb 20
in
Medicinal Chemistry
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votes
1
answer
32
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What is the effect of temperature on the adsorption of gas on a solid surface? Does the adsorption increase or decrease with temperature and why? Provide experimental data and theoretical explanations to support your answer.
asked
Feb 19
in
Surface Chemistry
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votes
1
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32
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How does the coordination environment of the metal ion in the active site of an enzyme affect its catalytic activity? Provide a specific example of a metalloenzyme and explain the role of coordination chemistry in its function.
asked
Feb 19
in
Coordination Chemistry
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votes
1
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31
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What is the bond order of the oxygen molecule (O2) using the molecular orbital theory, and how does it relate to the stability of the molecule?
asked
Feb 18
in
Physical Chemistry
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1
answer
31
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If 2.5 moles of NaOH reacts with excess HCl, how many moles of NaCl can be produced?
asked
Feb 17
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Chemical reactions
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1
answer
44
views
How can we optimize the synthesis conditions of metal-organic frameworks to achieve maximum yield and desired properties?
asked
Feb 14
in
Materials Chemistry
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answer
32
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What natural product can be extracted from a specific plant and effectively treat a particular medical condition, and what is the underlying pharmacological mechanism of this natural product?
asked
Feb 14
in
Medicinal Chemistry
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1
answer
33
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How does the metabolism of methionine differ from that of other amino acids?
asked
Feb 13
in
BioChemistry
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votes
1
answer
61
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How have environmental regulations impacted the chemical industry's production processes and how effective have they been in protecting the environment?
asked
Feb 13
in
Environmental Chemistry
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83
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Determine the enthalpy of adsorption for the reaction of hydrogen gas adsorbing onto a platinum surface, given that 2.00 g of hydrogen gas is adsorbed onto a 1.00 g platinum surface at 25°C and the pressure is 1 bar. The volume of the system is 1.00 L and the initial temperature of the platinum surface is also 25°C. Assume that the surface is in thermal equilibrium with the surroundings and that the gas behaves ideally.
asked
Feb 4
in
ThermoChemistry
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votes
1
answer
94
views
What is the effect of catalysts on the rate of a chemical reaction in terms of activation energy? And, using the Arrhenius equation, calculate the activation energy for the catalyzed and non-catalyzed reactions and compare the two values.
asked
Jan 31
in
Physical Chemistry
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1
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87
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What chemical reactions contribute to the formation of acid rain, and how do these reactions affect soil pH and water quality in affected areas?
asked
Jan 30
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Environmental Chemistry
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1
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94
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A 15.0 g sample of a mixture containing sodium chloride and sodium nitrate is dissolved in water, and then silver nitrate is added until no more precipitation occurs. The mass of the precipitate is found to be 20.4 g. What is the mass percentage of each component in the mixture?
asked
Jan 22
in
Analytical Chemistry
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1
answer
120
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What is the product formed by the electrophilic addition of HBr to propene? Provide the complete mechanism for the reaction.
asked
Jan 21
in
Organic Chemistry
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1
answer
130
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What is the balanced chemical equation for the oxidation of ethylene (C2H4) with potassium permanganate (KMnO4), and what are the oxidation states of the carbon atoms before and after the reaction?
asked
Jan 21
in
Organic Chemistry
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votes
1
answer
137
views
What is the IUPAC name of the compound with the molecular formula C5H8, which contains a triple bond between the second and third carbon atoms of the carbon chain?
asked
Jan 21
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Organic Chemistry
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1
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59
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What is the dopamine reward circuit?
asked
Jan 17
in
Psychology
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1
answer
82
views
What is the focus of Erikson's stage of identity versus confusion?
asked
Jan 15
in
Psychology
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1
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90
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Who introduced the 'Realistic Conflict Theory'?
asked
Jan 15
in
Psychology
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1
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80
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When does the Cognitive Appraisal Theory apply?
asked
Jan 15
in
Psychology
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