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How does the size and shape of nanoparticles affect their photochemical properties? Investigate the photochemical properties of nanoparticles with varying sizes and shapes, and determine how these properties relate to the particle's structural features.
asked
Feb 24
in
PhotoChemistry
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votes
1
answer
37
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How does the molecular structure of a compound affect its reactivity and selectivity in chemical reactions?
asked
Feb 21
in
Quantum Chemistry
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1
answer
33
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What is the effect of the concentration of surfactant on its ability to reduce surface tension in water?
asked
Feb 19
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Surface Chemistry
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1
answer
33
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How does the surface modification of polymers affect the adhesion properties of the material?
asked
Feb 17
in
Surface Chemistry
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1
answer
53
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What is the mechanism of ligand substitution reactions in octahedral coordination complexes? How does the size, charge, and electronic properties of the incoming ligand influence the reaction rate and selectivity of the substitution process?
asked
Feb 13
in
Coordination Chemistry
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1
answer
39
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How do Chlorofluorocarbons (CFCs) contribute to the depletion of the ozone layer and what chemical reactions are involved in the process?
asked
Feb 12
in
Environmental Chemistry
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1
answer
53
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How can the surface properties of a biomaterial such as a polymer be modified to improve its biocompatibility and reduce the risk of rejection or infection in medical implant applications? Provide a thorough explanation of the surface modification techniques and their effects on the biomaterial's surface chemistry and interactions with living tissues.
asked
Feb 11
in
Surface Chemistry
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1
answer
92
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How can the structure and properties of existing respiratory disease treatments be optimized to increase their effectiveness while minimizing side effects in patients?
asked
Feb 11
in
Medicinal Chemistry
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votes
1
answer
47
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How can the concentration of Persistent organic pollutants (POPs) in water bodies be effectively measured and reduced to mitigate their impact on aquatic organisms and the overall ecosystem?
asked
Feb 6
in
Environmental Chemistry
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votes
1
answer
35
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How can chemistry instructors better support the learning needs of students with disabilities and ensure equal access to the curriculum?
asked
Feb 4
in
Chemical education
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1
answer
57
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Calculate the standard enthalpy change of reduction for the reaction: Fe2O3(s) + 3H2(g) -> 2Fe(s) + 3H2O(l) Given: Standard enthalpy of formation (ΔHf°) of Fe2O3(s) = -822 kJ/mol Standard enthalpy of formation (ΔHf°) of H2O(l) = -286 kJ/mol Standard enthalpy of fusion (ΔHfus) of Fe(s) = 13.81 kJ/mol Standard enthalpy of vaporization (ΔHvap) of H2(g) = 0.449 kJ/mol Standard enthalpy of formation (ΔHf°) of H2(g) = 0 kJ/mol
asked
Feb 3
in
ThermoChemistry
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1
answer
97
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How can X-ray fluorescence spectroscopy be used to identify the presence and relative concentrations of specific elements in a sample? Provide a detailed explanation of the principles and techniques involved in this method. Additionally, discuss the limitations and potential errors that may be encountered during analysis and how these can be overcome or minimized.
asked
Jan 30
in
Analytical Chemistry
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1
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78
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Calculate the enthalpy change for the combustion of methane (CH4) at constant pressure, given that the heat of formation for methane is -74.9 kJ/mol and the balanced chemical equation is: CH4 (g) + 2O2 (g) -> CO2 (g) + 2H2O (l) The heat of formation for CO2 is -393.5 kJ/mol and the heat of formation for H2O is -285.8 kJ/mol.
asked
Jan 23
in
Chemical reactions
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votes
1
answer
51
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When might the concept of 'flow' be useful?
asked
Jan 20
in
Psychology
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0
answers
73
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Who put forth the principle of closure?
asked
Jan 20
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Psychology
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1
answer
66
views
What is group identity fusion?
asked
Jan 20
in
Psychology
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1
answer
56
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According to the cognitive-behavioural theory, how can a person with a phobia overcome their fear?
asked
Jan 17
in
Psychology
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votes
1
answer
64
views
How is a positive correlation represented on a scatter plot?
asked
Jan 16
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Psychology
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1
answer
68
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What is the role of peers in adolescent development according to Social Identity Theory?
asked
Jan 16
in
Psychology
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1
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74
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What is stress management?
asked
Jan 14
in
Psychology
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