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0
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37
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What is the exact chemical reaction that occurs during the preparation of 2,4-dinitrophenylhydrazine from hydrazine and 2,4-dinitrochlorobenzene? Also, what are the specific conditions required for this reaction to proceed efficiently?
answered
Feb 22
in
Chemical synthesis
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votes
36
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What is the most efficient protecting group strategy for selectively protecting a primary alcohol in the presence of other functional groups during organic synthesis?
answered
Feb 21
in
Organic Chemistry
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41
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How does the functionalization of metal-organic frameworks affect their ability to selectively adsorb carbon dioxide from a mixture of gases, and what factors influence this selectivity?
answered
Feb 20
in
Computational Chemistry
0
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38
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What is the effect of temperature on the solubility of a solute in a solvent? Provide experimental evidence to support your answer.
answered
Feb 20
in
Physical Chemistry
0
votes
26
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How does the coordination chemistry of metalloproteins and metalloenzymes affect their biological activity and function?
answered
Feb 19
in
Coordination Chemistry
0
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40
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How does the concentration of heavy metals in soil affect the growth of plants and their ability to uptake nutrients, and what are the implications for human consumption of these plants?
answered
Feb 19
in
Environmental Chemistry
0
votes
40
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How do the chemical structures of different polymers affect their mechanical properties, and which polymer(s) would be the most suitable for use in the manufacturing of biomedical devices like heart valves or joint replacements?
answered
Feb 18
in
Materials Chemistry
0
votes
30
views
How does the catalytic activity of enzymes depend on temperature and pH? Provide experimental evidence to support your answer.
answered
Feb 18
in
BioChemistry
0
votes
28
views
What is the balanced chemical equation for the reaction of hydrochloric acid (HCl) with sodium hydroxide (NaOH) to produce sodium chloride (NaCl) and water (H2O)?
answered
Feb 17
in
Chemical reactions
0
votes
53
views
What are the different types of liquid crystals and how do their properties vary based on their chemical structure?
answered
Feb 13
in
Physical Chemistry
0
votes
69
views
What is the predicted boiling point of diethyl ether (C4H10O) compared to butane (C4H10), based on their respective intermolecular forces?
answered
Feb 12
in
Chemical bonding
0
votes
44
views
How can the power conversion efficiency of polymer-based photovoltaic materials be improved?
answered
Feb 10
in
Polymer Chemistry
0
votes
41
views
How can the photochemical degradation of pollutants in the environment be enhanced using advanced oxidation processes (AOPs) and what are the mechanisms of such processes?
answered
Feb 10
in
PhotoChemistry
0
votes
46
views
How can the chemical industry reduce its environmental impact and promote sustainability in their projects, while still meeting economic and production goals?
answered
Feb 6
in
Environmental Chemistry
0
votes
29
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How can a process be developed for the large-scale production of hydrogen peroxide with the desired concentration and purity for use in medical and industrial applications?
answered
Feb 4
in
Chemical engineering
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62
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Calculate the standard free energy change (ΔG°) for the following redox reaction: Zn (s) + 2H+ (aq) → Zn2+ (aq) + H2 (g)Given: ΔG°f (Zn2+) = -153.9 kJ/mol ΔG°f (H+) = 0 kJ/mol ΔG°f (H2) = 0 kJ/mol ΔG°f (Zn) = 0 kJ/mol
answered
Feb 3
in
Chemical thermodynamics
0
votes
66
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Calculate the standard enthalpy change for the formation of ammonium chloride (NH4Cl) from its constituent elements, nitrogen (N2), hydrogen (H2), and chlorine (Cl2), given the following information:Reaction equation: N2(g) + 4H2(g) + 2Cl2(g) → 2NH4Cl(s)Standard enthalpy of formation for NH4Cl: -314.4 kJ/molStandard enthalpy of formation for N2(g): 0 kJ/molStandard enthalpy of formation for H2(g): 0 kJ/molStandard enthalpy of formation for Cl2(g): 0 kJ/mol Express your answer in kilojoules per mole (kJ/mol).
answered
Feb 3
in
Chemical thermodynamics
0
votes
59
views
Calculate the enthalpy change for the combustion of methane gas (CH4) at standard conditions given the following information: 4 moles of methane gas is burned in excess oxygen gas (O2) to form carbon dioxide gas (CO2) and liquid water (H2O). The enthalpy change for the combustion of 1 mole of methane gas is -890.4 kJ/mol.
answered
Jan 23
in
Chemical thermodynamics
0
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71
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According to the theory of reliability, how is the stability of a measure assessed?
answered
Jan 20
in
Psychology
0
votes
98
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According to Lev Vygotsky's sociocultural theory, why is social interaction important for cognitive development?
answered
Jan 20
in
Psychology
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