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0
votes
1
answer
42
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How does the reaction rate of the decomposition of hydrogen peroxide in the presence of a catalyst vary with increasing pressure?
asked
Feb 24
in
Chemical kinetics
0
votes
1
answer
32
views
What is the reaction mechanism for the addition of HBr to propene according to quantum chemical calculations?
asked
Feb 22
in
Computational Chemistry
0
votes
1
answer
26
views
How does the length of a conjugated polymer chain affect its electronic and optical properties, and how can this be optimized for improved device performance in organic electronics?
asked
Feb 20
in
Quantum Chemistry
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votes
1
answer
30
views
What is the effect of temperature on the phase transition of liquid crystals?
asked
Feb 20
in
Physical Chemistry
0
votes
1
answer
26
views
What is the effect of different amino acid substitutions in the DNA binding domain of a transcription factor on its ability to bind to DNA?
asked
Feb 19
in
BioChemistry
0
votes
1
answer
28
views
What is the chemical process behind the formation of acid rain, and what are the environmental effects of acid rain on aquatic life and terrestrial ecosystems?
asked
Feb 18
in
Environmental Chemistry
0
votes
1
answer
28
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What is the balanced chemical equation for the reaction between hydrochloric acid and sodium hydroxide, and what is the concentration of H+ and OH- ions in the resulting solution?
asked
Feb 17
in
Chemical reactions
0
votes
1
answer
69
views
What is the oxidation state of nitrogen in the compound HNO3?
asked
Feb 13
in
ElectroChemistry
0
votes
1
answer
46
views
What type of bond exists between nitrogen and oxygen atoms in nitrogen dioxide (NO2)?
asked
Feb 13
in
Chemical bonding
0
votes
1
answer
65
views
What is the mechanism of Hofmann rearrangement, and how is it related to the conversion of primary amides into amines?
asked
Feb 13
in
Organic Chemistry
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votes
1
answer
36
views
How can the electrical conductivity of polymer-based electronic materials be enhanced without compromising their mechanical properties?
asked
Feb 7
in
Polymer Chemistry
0
votes
1
answer
37
views
How can computational chemistry be used to optimize the synthesis of metal-organic frameworks for improved gas storage and separation?
asked
Feb 6
in
Computational Chemistry
0
votes
1
answer
91
views
Design a distillation column that separates a mixture of benzene and toluene with a feed of 50 mol% benzene and 50 mol% toluene, into two product streams: one with a purity of 99% benzene and the other with a purity of 99% toluene. The total distillate flow rate should be 80% of the feed flow rate and the reflux ratio should be 1.5 times the minimum reflux ratio. Provide a complete design including the required stages, the reboiler duty, and the reflux flow rate.
asked
Feb 3
in
Chemical engineering
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votes
1
answer
74
views
Consider an electrochemical cell containing a copper electrode in a 0.5 M CuSO4 solution and a silver electrode in a 1.0 M AgNO3 solution. Calculate the current density at a temperature of 25°C given that the copper electrode has a surface area of 5 cm² and the silver electrode has a surface area of 10 cm². The standard reduction potentials for Cu²⁺ and Ag⁺ are -0.34 V and 0.80 V, respectively. Use the Nernst equation to calculate the cell potential and then use Ohm's law to calculate the current density.
asked
Feb 3
in
ElectroChemistry
0
votes
1
answer
66
views
Calculate the standard enthalpy change for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) to form sodium chloride (NaCl) and water (H2O), given the following information:- Heat capacity of the solution = 4.18 J/g°C- Volume of the solution = 50 mL- Concentration of HCl = 0.25 M- Concentration of NaOH = 0.10 M
asked
Feb 3
in
Chemical thermodynamics
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votes
1
answer
81
views
Calculate the amount of heat released when 10.0 g of methane gas (CH4) is burned in excess oxygen at constant pressure, given that the enthalpy of combustion of methane is -890.3 kJ/mol.
asked
Jan 23
in
Physical Chemistry
0
votes
1
answer
66
views
According to the self-fulfilling prophecy, what is the effect of expectations on the behaviour of others?
asked
Jan 20
in
Psychology
0
votes
1
answer
107
views
According to social identity theory, what is in-group favoritism?
asked
Jan 20
in
Psychology
0
votes
1
answer
68
views
How can positive psychology contribute to the prevention of mental health issues?
asked
Jan 20
in
Psychology
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votes
1
answer
41
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Who created the concept of emotional intelligence?
asked
Jan 20
in
Psychology
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