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What is the most efficient catalyst for the synthesis of polyacrylonitrile from acrylonitrile monomer?
asked
Feb 21
in
Chemical synthesis
0
votes
1
answer
28
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What is the effect of varying concentrations of water as a solvent on the reaction rate of a given chemical reaction?
asked
Feb 20
in
Chemical kinetics
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1
answer
30
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What is the effect of increasing concentration of product X on the reaction rate of the chemical reaction A + B -> X?
asked
Feb 19
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Chemical kinetics
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1
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34
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How does the carbon footprint of different industries (such as transportation, electricity generation, and agriculture) affect the concentration of greenhouse gases in the atmosphere and contribute to climate change?
asked
Feb 18
in
Environmental Chemistry
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votes
1
answer
67
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What are the hybrid orbitals involved in the formation of a carbon-oxygen double bond in methanal (formaldehyde)?
asked
Feb 13
in
Chemical bonding
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1
answer
60
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What is the role of hydrogen bonding in maintaining the stability of the double helix structure of DNA?
asked
Feb 13
in
BioChemistry
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1
answer
41
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How can chemistry students overcome limited opportunities for hands-on experimentation and still gain a deep understanding of laboratory techniques and chemical reactions?
asked
Feb 5
in
Chemical education
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1
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118
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Design a cost-effective and environmentally sustainable process for the production of biofuels from lignocellulosic materials, integrating pre-treatment, enzymatic hydrolysis and fermentation steps, while optimizing yield, energy efficiency, and minimizing waste generation.
asked
Feb 3
in
Chemical engineering
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1
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47
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Consider the following chemical equation: 2 SO2(g) + O2(g) ⇌ 2 SO3(g)At equilibrium, the concentration of SO2 was found to be 0.10 M, the concentration of O2 was found to be 0.20 M, and the concentration of SO3 was found to be 0.30 M. What is the value of the equilibrium constant (Kc) for this reaction at the given temperature?
asked
Feb 3
in
Chemical equilibrium
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1
answer
15
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Calculate the standard enthalpy change (∆H°) for the neutralization reaction of 50.0 mL of 0.100 M HCl with 75.0 mL of 0.0750 M NaOH at a constant pressure of 1 atm and a temperature of 25°C.
asked
Feb 3
in
Chemical thermodynamics
0
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1
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127
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What is the concentration of an HCl solution if 25.0 ml of the solution requires 35.0 ml of 0.10 M NaOH solution to reach the endpoint of titration?
asked
Jan 30
in
Analytical Chemistry
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1
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70
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Calculate the irreversible work done by a gas expanding adiabatically from an initial volume of 1 L to a final volume of 5 L against a constant external pressure of 2 atm, assuming that the gas is initially at a temperature of 300 K and that its final temperature is 400 K.
asked
Jan 23
in
Physical Chemistry
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60
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Calculate the Gibbs free energy change for the combustion of ethane gas in oxygen gas to form carbon dioxide gas and water vapor at a temperature of 25 °C and a pressure of 1 atm, given the following thermodynamic data:Reaction: C2H6(g) + 3.5O2(g) → 2CO2(g) + 3H2O(g)ΔH°rxn = -1560.8 kJ/molΔS°rxn = -283.3 J/K•molUsing the above information, what is the value of the Gibbs free energy change at standard conditions?
asked
Jan 23
in
Chemical thermodynamics
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1
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81
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Calculate the enthalpy change for the ionization of hydrogen atom if the ionization energy required is 1312 kJ/mol.
asked
Jan 23
in
ThermoChemistry
+1
vote
1
answer
87
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What is the zone of proximal development by Lev Vygotsky?
asked
Jan 20
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Psychology
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1
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50
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What are some common factors that contribute to the development of borderline personality disorder?
asked
Jan 20
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Psychology
0
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1
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154
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How does the concept of self-efficacy relate to positive psychology outcomes?
asked
Jan 20
in
Psychology
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1
answer
44
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What is the role of psychology in addressing social erasure?
asked
Jan 20
in
Psychology
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1
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46
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What is the difference between primary and secondary sexual characteristics?
asked
Jan 20
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Psychology
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1
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89
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When might conformity increase within a group?
asked
Jan 17
in
Psychology
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