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User MelbaTulloch
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What is the relationship between the photoluminescence intensity of quantum dots and the size of the quantum dots, and how does this relationship vary for different types of quantum dots?
asked
Feb 24
in
PhotoChemistry
0
votes
1
answer
84
views
What is the most efficient method for synthesizing a new adhesive that meets both high strength and low toxicity standards in chemical engineering?
asked
Feb 21
in
Chemical engineering
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votes
1
answer
84
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What is the formal charge of the nitrogen atom in the ammonium ion (NH4+)?
asked
Feb 20
in
Inorganic Chemistry
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votes
1
answer
80
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What is the effect of temperature on the rate and efficiency of the reaction between magnesium and hydrochloric acid in terms of the production of hydrogen gas?
asked
Feb 20
in
Chemical kinetics
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votes
1
answer
75
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What is the balanced chemical equation for the precipitation reaction between sodium carbonate and calcium chloride, and what is the mass of calcium carbonate that can be formed from 25 grams of sodium carbonate reacting with excess calcium chloride?
asked
Feb 17
in
Chemical reactions
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votes
1
answer
80
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How does the addition of a catalyst affect the yield and molecular weight of polystyrene synthesized from styrene monomer via free radical polymerization?
asked
Feb 17
in
Chemical synthesis
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1
answer
83
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What is the effect of pH on the activity of the enzyme invertase in breaking down sucrose into glucose and fructose?
asked
Feb 17
in
BioChemistry
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1
answer
90
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How does Methionine-oxidation affect the rate of protein degradation and turnover in human cells?
asked
Feb 13
in
BioChemistry
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votes
1
answer
166
views
How does the ligand field splitting affect the magnetic properties of a transition metal complex and what are the factors that influence it?
asked
Feb 13
in
Quantum Chemistry
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votes
1
answer
83
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How can Computational chemistry and molecular modeling be used to predict the properties of a new drug candidate?
asked
Feb 6
in
Physical Chemistry
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votes
1
answer
78
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How can chemistry teachers provide adequate support for students with learning disabilities to ensure they have equal opportunities to succeed in the subject?
asked
Feb 6
in
Chemical education
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1
answer
85
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How can a student calculate the bond order of the N2 molecule using molecular orbital theory, and what does the calculated bond order indicate about the stability and strength of the nitrogen-nitrogen bond in the molecule?
asked
Feb 4
in
Chemical bonding
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votes
1
answer
130
views
Calculate the standard enthalpy change for the fusion of solid hydrogen (H₂) at its melting point of 13.81 K, given that the standard enthalpy of fusion of H₂ is 0.117 kJ/mol.
asked
Feb 3
in
Chemical thermodynamics
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votes
1
answer
116
views
Calculate the standard enthalpy change (∆H°) for the vaporization of 10 grams of water at 100°C, given that the molar heat of vaporization of water is 40.7 kJ/mol.
asked
Feb 3
in
Chemical thermodynamics
+1
vote
1
answer
69
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Using X-ray diffraction, determine the chemical composition of an unknown mineral sample.
asked
Jan 30
in
Analytical Chemistry
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1
answer
101
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Assuming a standard hydrogen electrode is used as the reference electrode and a copper electrode is used as the working electrode in an electrochemical cell, calculate the polarization potential when the current density on the copper electrode is 0.5 mA/cm^2 and the concentration of Cu2+ in the solution is 0.1 M.
asked
Jan 22
in
ElectroChemistry
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1
answer
26
views
How does the self-concordance model explain positive psychology outcomes?
asked
Jan 20
in
Psychology
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votes
1
answer
64
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How do psychopharmaceuticals differ from other drug classes?
asked
Jan 20
in
Psychology
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1
answer
243
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What is the assumption of the frustration-aggression theory?
asked
Jan 17
in
Psychology
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1
answer
109
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What is the Emotion-Focussed coping strategy?
asked
Jan 16
in
Psychology
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