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What specific photochemical mechanisms allow sunscreen agents such as Avobenzone and Octinoxate to effectively absorb harmful UV radiation, and how do these mechanisms differ between these two common sunscreen ingredients?
answered
Feb 14
in
PhotoChemistry
0
votes
128
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What is the color of iron(III) chloride, FeCl3, in aqueous solution, and how does it change with increasing concentration?
answered
Feb 13
in
Inorganic Chemistry
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82
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How can the stability of a colloidal suspension be affected by changing the ionic strength of the solution?
answered
Feb 10
in
Physical Chemistry
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35
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How can the growth of carbon nanotubes be optimized to result in the highest quality and quantity using the newly developed synthesis methods in materials chemistry?
answered
Feb 7
in
Materials Chemistry
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votes
39
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How can the conductivity of solid-state polymer electrolytes be improved for use in high-performance batteries?
answered
Feb 6
in
Polymer Chemistry
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29
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How can coordination chemistry principles be used to design more efficient chelating agents for the treatment of heavy metal poisoning?
answered
Feb 5
in
Coordination Chemistry
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40
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How can molecular docking studies aid in developing new drugs to target COVID-19 protease enzyme?
answered
Feb 5
in
Computational Chemistry
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votes
74
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Given the chemical equation for the oxidation of iron (Fe) to form iron(III) oxide (Fe2O3), determine the oxidation state of iron in both the reactant and product.
answered
Feb 4
in
Chemical reactions
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50
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Consider the reaction A + B ⇌ C + D, which has an equilibrium constant of 2.0 x 10^-3 at a given temperature. Initially, 0.10 mol of A and 0.20 mol of B are placed in a flask. Calculate the equilibrium concentrations of all species in the flask.
answered
Feb 3
in
Chemical equilibrium
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46
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Calculate the standard enthalpy change for the following reaction involving solids at 298 K:Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) Given the following standard enthalpies of formation in kJ/mol: Fe2O3(s) = -825.5 Fe(s) = 0CO2(g) = -393.5 CO(g) = -110.5
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Feb 3
in
Chemical thermodynamics
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76
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Calculate the specific surface area of a catalyst using BET theory, given that the quantity of gas physically adsorbed at a certain temperature and pressure is 0.25 moles, the molar volume of the gas is 22.4 L/mol, the weight of the catalyst used is 0.5 g, and the monolayer coverage of the adsorbate is 0.2.
answered
Feb 3
in
Surface Chemistry
0
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107
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What is the mechanism of action of a newly developed drug for treating cardiovascular diseases and how does it differ from existing treatments?
answered
Jan 31
in
Medicinal Chemistry
0
votes
119
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What is the evolutionary perspective in psychology?
answered
Jan 20
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Psychology
0
votes
69
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According to the behaviourist theory, how is learning best achieved?
answered
Jan 20
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Psychology
0
votes
166
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Please compare the concept of 'ego strength' in Erikson's theory versus that of 'cognitive complexity' in Robert Kegan's theory.
answered
Jan 17
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Psychology
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81
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What is the role of resilience in recovery after trauma according to the resilience theory?
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Jan 17
in
Psychology
0
votes
63
views
According to evolutionary psychology, what is natural selection?
answered
Jan 16
in
Psychology
0
votes
49
views
What can the McGurk effect tell us?
answered
Jan 16
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Psychology
0
votes
79
views
What is the range of human hearing?
answered
Jan 15
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Psychology
0
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92
views
What is the cognitive developmental theory of moral development?
answered
Jan 14
in
Psychology
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