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What is the optimum temperature, pressure and catalyst combination for the synthesis of polyvinyl alcohol from vinyl acetate monomer? How does changing the conditions affect the yield and purity of the final product?
asked
Feb 22
in
Chemical synthesis
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votes
1
answer
27
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What is the balanced chemical equation for the synthesis of magnesium oxide from its constituent elements?
asked
Feb 17
in
Chemical reactions
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votes
1
answer
90
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How do intermolecular forces affect the solubility of polar and nonpolar molecules in different solvents?
asked
Feb 13
in
Quantum Chemistry
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votes
1
answer
50
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How can the synthesis of polyethylene from ethylene monomer be optimized to improve the properties of the final product in terms of strength and density?
asked
Feb 11
in
Chemical synthesis
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votes
1
answer
67
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Calculate the standard enthalpy change for the reaction between 50 mL of 1.0 M HCl and 50 mL of 1.0 M NaOH at 25°C given that the temperature of the resultant solution is 31.2°C and the specific heat capacity of the solution is 4.184 J/g°C.
asked
Feb 3
in
Chemical thermodynamics
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1
answer
80
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How does adding a substituent to a molecule affect its excitation energy? Use quantum chemical calculations to compare the excitation energies of a set of closely related molecules, one with a substituent and one without, and determine the effect of the substituent on the molecules' excited states.
asked
Jan 30
in
Computational Chemistry
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1
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113
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What is the concentration of iron (II) ions in a given solution using spectrophotometry if the absorbance value obtained from a calibration curve is 0.58 and the molar absorptivity of iron (II) ions at the given wavelength is 9.6 x 10^3 L mol^-1 cm^-1?
asked
Jan 30
in
Analytical Chemistry
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votes
1
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63
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How can we determine the concentration of a sample solution containing a mixture of ferrocyanide and ferricyanide ions using polarography?
asked
Jan 29
in
Analytical Chemistry
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1
answer
105
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Please evaluate the Diathesis-Stress Model.
asked
Jan 16
in
Psychology
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1
answer
46
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Where is the criterion of simplicity applicable?
asked
Jan 16
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Psychology
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votes
1
answer
82
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What are the benefits of integrating indigenous psychology into mainstream psychology?
asked
Jan 16
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Psychology
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votes
1
answer
49
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What can the McGurk effect tell us?
asked
Jan 16
in
Psychology
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votes
1
answer
37
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What is euthanasia?
asked
Jan 15
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Psychology
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votes
1
answer
60
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What is the role of anxiety in existential psychology?
asked
Jan 15
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Psychology
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votes
1
answer
79
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What is the cognitive model of trauma?
asked
Jan 14
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Psychology
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votes
1
answer
67
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Which planet is the kuiper belt closest to?
asked
Jan 8
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Science
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votes
1
answer
59
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What is a common chemical substance on planet earth?
asked
Jan 6
in
Science
0
votes
1
answer
94
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What does the triploid cell develop into during fertilization?
asked
Jan 6
in
Science
0
votes
1
answer
127
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What destroys the filtered pathogens?
asked
Jan 6
in
Science
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votes
1
answer
96
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Stomata are special pores that allow gasses to enter and exit what?
asked
Dec 31, 2024
in
Science
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