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0
votes
38
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What is the optimal molar ratio of phenol to nitric acid for the preparation of 2,4-dinitrophenol, and how does changing this ratio affect the yield and purity of the final product?
answered
Feb 21
in
Chemical synthesis
0
votes
33
views
What are the most effective photochemical processes for degrading pollutants in the environment, and how do the properties of these pollutants affect their degradation rates under different environmental conditions?
answered
Feb 21
in
PhotoChemistry
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votes
28
views
What is the effect of different catalysts on the polymerization of ethylene monomer during the synthesis of polyethylene, in terms of yield and quality of the final product?
answered
Feb 19
in
Chemical synthesis
0
votes
29
views
How does the activation energy of the C-H bond cleavage reaction in methane vary with increasing temperature, as determined through quantum chemical calculations?
answered
Feb 17
in
Computational Chemistry
0
votes
40
views
What is the role of chaperone proteins in the folding process of newly synthesized proteins and how do they assist in preventing misfolding or aggregation?
answered
Feb 12
in
BioChemistry
0
votes
62
views
Calculate the standard enthalpy change (∆H°) of combustion for methane gas (CH4) given that the heat of formation (∆Hf°) for methane is -74.87 kJ/mol and the heat of formation (∆Hf°) for carbon dioxide (CO2) is -393.51 kJ/mol, and the heat of formation (∆Hf°) for water (H2O) is -285.83 kJ/mol.
answered
Feb 3
in
Chemical thermodynamics
0
votes
96
views
How can you determine the concentration of copper (II) ions in a solution using colorimetry?
answered
Jan 30
in
Analytical Chemistry
0
votes
66
views
Calculate the enthalpy change of ionization for hydrogen gas when one mole of H2 gas is ionized to form two moles of H+ ions in the gas phase, given that the enthalpy change of ionization for H(g) is +1312 kJ/mol.
answered
Jan 23
in
ThermoChemistry
0
votes
59
views
Calculate the amount of ozone depletion caused by the release of 1000 metric tons of chlorofluorocarbons (CFCs) into the atmosphere and explain the impact it can have on the atmosphere in terms of UV radiation and human health.
answered
Jan 23
in
Environmental Chemistry
0
votes
72
views
Calculate the amount of heat required to raise the temperature of 50 grams of water from 25°C to 85°C, given the specific heat of water is 4.184 J/g°C.
answered
Jan 23
in
ThermoChemistry
0
votes
134
views
What are some of the challenges of treating borderline personality disorder?
answered
Jan 20
in
Psychology
0
votes
47
views
What is the role of resilience in recovery after trauma according to the resilience theory?
answered
Jan 17
in
Psychology
0
votes
76
views
Who proposed the use of electroconvulsive therapy ECT in the treatment of depression?
answered
Jan 16
in
Psychology
0
votes
242
views
According to the Social Influence theory, how does informational influence work?
answered
Jan 16
in
Psychology
0
votes
76
views
What is assisted suicide?
answered
Jan 15
in
Psychology
0
votes
80
views
What is the theory of attachment?
answered
Jan 15
in
Psychology
0
votes
49
views
What is the role of gratitude in positive psychology?
answered
Jan 14
in
Psychology
0
votes
86
views
What is the behavioural model of depression?
answered
Jan 14
in
Psychology
0
votes
53
views
What elements have the highest attraction for electrons?
answered
Jan 6
in
Science
0
votes
72
views
The type of what dictates how far it can penetrate into matter, such as lead or human flesh?
answered
Jan 2
in
Science
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