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What is the effect of different solvents (methanol, ethanol, and water) on the fluorescence emission of luminescent materials?
asked
Feb 19
in
PhotoChemistry
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votes
1
answer
32
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How does the concentration of emulsifiers affect the stability of oil-in-water emulsions?
asked
Feb 19
in
Surface Chemistry
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1
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26
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What is the activation energy of the reaction between hydrogen gas and iodine gas to form hydrogen iodide, given that the rate constant at 25°C is 1.52 × 10^-3 L^2mol^-2s^-1 and the activation energy of the reaction is 186.3 kJ/mol?
asked
Feb 17
in
Chemical reactions
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1
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33
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How does temperature affect the rate of a gas-phase reaction as determined by Monte Carlo simulations?
asked
Feb 17
in
Computational Chemistry
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1
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30
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What is the effect of changing the concentration of one reactant on the reaction rate of a second-order reaction? Provide numerical data to support your answer.
asked
Feb 13
in
Chemical kinetics
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1
answer
80
views
How can the sensitivity and selectivity of polymer-based sensors be optimized for detecting specific molecules?
asked
Feb 10
in
Polymer Chemistry
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1
answer
45
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How can magnetic resonance spectroscopy be used to determine the purity and concentration of a sample in organic chemistry?
asked
Feb 5
in
Physical Chemistry
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1
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71
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Calculate the resistance of an electrochemical cell with a cell potential of 1.5 V and current flow of 0.25 A when the concentration of copper(II) ions in the cathode compartment is 0.25 M and the concentration of zinc ions in the anode compartment is 0.50 M. The cell has two electrodes made of platinum and the temperature is 25°C. (Assume the transfer of electrons and ions is 100% efficient.)
asked
Feb 3
in
ElectroChemistry
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1
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104
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How can a chemistry student effectively access relevant and up-to-date textbooks and resources given the limited availability of such materials in their local area or institution?
asked
Jan 30
in
Chemical education
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1
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18
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What is the concentration of copper ions present in a sample if the absorbance value is 0.345 and the path length is 1 cm? The molar absorptivity of copper ions is known to be 4.58 x 10^4 L mol^-1 cm^-1 at a wavelength of 600 nm in spectrophotometry.
asked
Jan 30
in
Analytical Chemistry
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1
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64
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Analyzing the presence and concentration of heavy metals in landfill leachate and determining their impact on groundwater quality: A case study in a selected landfill site.
asked
Jan 22
in
Environmental Chemistry
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1
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49
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Where the brain is involved in controlling behaviour, what theory suggests that behaviour is associated with neural activity in specific regions of the brain?
asked
Jan 20
in
Psychology
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1
answer
56
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How does the social identity model of deindividuation effects SIDE explain the role of anonymity and group membership in online aggression?
asked
Jan 20
in
Psychology
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1
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100
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What is tip-of-the-tongue phenomenon?
asked
Jan 20
in
Psychology
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1
answer
42
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According to the Young-Helmholtz theory, how does color vision work?
asked
Jan 17
in
Psychology
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1
answer
44
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Compare the critical and sensitive periods in human development.
asked
Jan 17
in
Psychology
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1
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58
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What are the ethical concerns associated with the use of AI in mental health care?
asked
Jan 17
in
Psychology
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1
answer
52
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How do we evaluate the falsifiability of psychodynamic theories?
asked
Jan 16
in
Psychology
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1
answer
45
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Why might the socialisation theory of masculinity be criticised?
asked
Jan 15
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Psychology
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1
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130
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What is the working memory model proposed by the cognitive psychologist Baddeley and Hitch?
asked
Jan 15
in
Psychology
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