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What would be the optimal process conditions (e.g. temperature, pressure, and reaction time) for the production of biofuels from agricultural waste using a specific type of catalyst to achieve maximum yield and purity?
asked
Feb 21
in
Chemical engineering
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votes
1
answer
28
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What is the effect of polymer molecular weight on the mechanical properties of 3D printed objects?
asked
Feb 21
in
Polymer Chemistry
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1
answer
39
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How does the concentration of heavy metals in water affect the survival and growth of aquatic plants in a polluted river?
asked
Feb 19
in
Environmental Chemistry
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1
answer
37
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How does the application of surface chemistry principles impact the quality and shelf-life of packaged food and beverages?
asked
Feb 17
in
Surface Chemistry
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votes
1
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35
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How does the variation of Si/Al ratio affect the acidity of zeolites? Provide a computational study exploring the effects of Si/Al ratio on the acidic behavior of zeolites.
asked
Feb 17
in
Computational Chemistry
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1
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94
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In a solution of water and ethanol, which molecule exhibits a stronger intermolecular interaction and why? Use quantum chemistry calculations to determine the strength of the intermolecular forces and the extent of solvation effects in the solution.
asked
Feb 13
in
Quantum Chemistry
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1
answer
72
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What is the balanced equation for the double replacement reaction between silver nitrate (AgNO3) and sodium chloride (NaCl)?
asked
Feb 13
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Chemical reactions
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1
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35
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How can chemistry students at a school with insufficient funding for chemistry education still have access to adequate laboratory equipment and materials to conduct experiments?
asked
Feb 4
in
Chemical education
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1
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98
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Calculate the standard enthalpy change (ΔH°) for the phase transition reaction of ice to water, given that the enthalpy of fusion for ice is 6.01 kJ/mol and the specific heat capacity of water is 4.18 J/g·°C. Express your answer in kJ/mol.
asked
Feb 3
in
Chemical thermodynamics
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1
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107
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Calculate the overpotential of a lead electrode in contact with a solution containing [Pb2+] = 0.001 M when the temperature is 298 K. Given that the standard potential of the Pb2+ / Pb electrode is -0.13 V and the exchange current density is 0.015 A/m2.
asked
Feb 3
in
ElectroChemistry
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1
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101
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How do the electronic and optical properties of a nanomaterial change as its size decreases? Using quantum chemistry calculations, determine the change in band gap and plasmon resonance frequency of a gold nanoparticle as it decreases from 50 nm to 5 nm in diameter.
asked
Jan 31
in
Quantum Chemistry
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1
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87
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What is the boiling point of a substance with London dispersion forces and hydrogen bonding compared to a substance with only London dispersion forces, given that both substances have a similar molar mass and molecular size?
asked
Jan 30
in
Chemical bonding
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1
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64
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Calculate the internal energy and entropy change for a gas that undergoes an isothermal expansion from 2.0 L to 3.0 L at a constant temperature of 300 K.
asked
Jan 23
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Physical Chemistry
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1
answer
90
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A chemistry student wants to determine the effect of adding a buffer to a solution containing acetic acid (CH3COOH) and its conjugate base (CH3COO-), which is in equilibrium with its ionized form (H+ and CH3COO-). The initial concentration of acetic acid is 0.2 M and the pH of the solution is 4.5. If the student adds a buffer solution containing equal amounts of acetic acid and sodium acetate (NaCH3COO), what will be the new pH of the solution and the extent of shift in equilibrium position?
asked
Jan 22
in
Chemical equilibrium
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votes
1
answer
108
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What are the assumptions of discursive psychology?
asked
Jan 20
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Psychology
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1
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121
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How did Skinner's 'Skinner box' experiment demonstrate operant conditioning?
asked
Jan 20
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Psychology
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1
answer
51
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What are the advantages of the drive reduction theory of motivation?
asked
Jan 16
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Psychology
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1
answer
21
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What is the meaning of cultural competence?
asked
Jan 14
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Psychology
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1
answer
41
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What is the frailty theory?
asked
Jan 14
in
Psychology
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1
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67
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What is motivation?
asked
Jan 14
in
Psychology
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