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How do the intrinsic electronic and optical properties of a conjugated polymer depend on its molecular structure and the nature of substituents attached to its backbone?
asked
Feb 20
in
Quantum Chemistry
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votes
1
answer
85
views
How does the concentration and nature of pollutants in the environment affect the extent and rate of their degradation by photochemical processes?
asked
Feb 18
in
PhotoChemistry
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1
answer
91
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What specific factors affect the photochemical properties of nanoparticles, and how can these properties be tuned for potential applications in fields such as nanomedicine and energy conversion?
asked
Feb 14
in
PhotoChemistry
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votes
1
answer
75
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What are the key chemical reactions and processes involved in designing a system for the production of cosmetics, and how can they be optimized to improve quality and efficiency?
asked
Feb 12
in
Chemical engineering
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1
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160
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How can the surface chemistry of food and beverage processing be modulated to design more efficient and sustainable food packaging materials that prolong shelf-life and enhance safety?
asked
Feb 11
in
Surface Chemistry
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votes
1
answer
92
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How can chemistry educators provide more emphasis on environmental chemistry in the curriculum to ensure students have a better understanding of its crucial role in preserving the planet's ecosystem?
asked
Feb 4
in
Chemical education
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1
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135
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Calculate the standard enthalpy change for the reaction below, given the standard enthalpy of formation values: 2CO(g) + O2(g) → 2CO2(g)ΔH°f (CO) = -110.5 kJ/molΔH°f (O2) = 0 kJ/molΔH°f (CO2) = -393.5 kJ/mol
asked
Feb 3
in
Chemical thermodynamics
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votes
1
answer
134
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What is the concentration of caffeine in a freshly brewed cup of coffee? Using liquid chromatography, analyze the composition of the coffee sample and determine the peak for caffeine. From the peak area and a known standard of caffeine, calculate the concentration of caffeine in the coffee sample.
asked
Jan 30
in
Analytical Chemistry
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votes
1
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134
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How can X-ray fluorescence spectroscopy be used to distinguish between iron and aluminum in a mixed sample?
asked
Jan 30
in
Analytical Chemistry
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1
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106
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Calculate the bond dissociation energy (in kJ/mol) of the H-Cl bond in HCl using the following data: the standard enthalpy of formation of HCl is -92.31 kJ/mol, the bond energy of H-H is 436 kJ/mol, and the bond energy of Cl-Cl is 240 kJ/mol.
asked
Jan 23
in
Chemical bonding
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1
answer
129
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A metal rod made of iron is coupled with a zinc rod in an aqueous medium. If the corrosion potential of the iron rod is -0.44 V and that of the zinc rod is -0.76 V, calculate the corrosion current density of the iron rod when coupled with the zinc rod at 25°C. The polarization resistance of the iron rod is 880 Ωcm².
asked
Jan 22
in
ElectroChemistry
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1
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171
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What is the difference between IQ and EQ?
asked
Jan 17
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Psychology
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1
answer
175
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Why is Freud's theory of psychoanalysis important to psychology?
asked
Jan 17
in
Psychology
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1
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222
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What is the impact of cultural differences on human psychology?
asked
Jan 17
in
Psychology
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1
answer
60
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Where do psychologists use theory evaluation?
asked
Jan 16
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Psychology
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votes
1
answer
63
views
Where can you find empirical evidence for the role of intersectionality in masculinity?
asked
Jan 15
in
Psychology
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votes
1
answer
144
views
How do neural processes contribute to perceptual illusions?
asked
Jan 15
in
Psychology
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1
answer
67
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According to the point-biserial correlation coefficient, what type of data should at least one variable be?
asked
Jan 15
in
Psychology
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1
answer
93
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Who are the common psychologists who proposed a cognitive-behavioural multimodal approach?
asked
Jan 15
in
Psychology
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1
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102
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According to the two-factor theory of emotion, what causes emotions?
asked
Jan 15
in
Psychology
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