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votes
1
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36
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How does the photochemical behavior of octahedral coordination compounds differ from that of tetrahedral complexes? Provide a detailed analysis and experimental evidence to support your answer.
asked
Feb 22
in
PhotoChemistry
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votes
1
answer
33
views
What is the optimal ratio of salicylic acid and acetic anhydride needed to produce a maximum yield of aspirin in a chemical synthesis reaction, and how does the temperature and reaction time affect the yield of aspirin in this synthesis reaction?
asked
Feb 21
in
Chemical synthesis
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votes
1
answer
36
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What is the most efficient protecting group method for the synthesis of carboxylic acid derivatives such as esters and amides without affecting the functionality of other groups on the same molecule?
asked
Feb 21
in
Organic Chemistry
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votes
1
answer
33
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How does the intensity of light affect the rate of photochemical reactions in a given solution containing a photosensitive compound?
asked
Feb 20
in
PhotoChemistry
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1
answer
33
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What is the effect of cooling rate on the crystallization of polyethylene and polypropylene? Can you explain the observed differences in morphology and properties for both polymers?
asked
Feb 19
in
Polymer Chemistry
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votes
1
answer
33
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How does temperature affect the rate and mechanism of a chemical reaction? Provide a case study using quantum chemistry techniques to explain the observed changes in reaction rate and mechanism as temperature is varied.
asked
Feb 17
in
Quantum Chemistry
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votes
1
answer
41
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How does sunlight affect the degradation of pollutants, such as pesticides and herbicides, in the environment and what are the chemical processes involved in photochemical degradation?
asked
Feb 14
in
PhotoChemistry
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votes
1
answer
31
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What is the mechanism of protein adsorption on solid surfaces and how can this knowledge be applied to develop more effective biomaterials for medical implants?
asked
Feb 14
in
Surface Chemistry
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votes
1
answer
99
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How can we improve the photostability of sunscreen agents under UV irradiation?
asked
Feb 13
in
PhotoChemistry
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votes
1
answer
51
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How do different greenhouse gases (carbon dioxide, methane, nitrous oxide, etc.) contribute to global warming and what is the relative importance of each gas?
asked
Feb 13
in
Environmental Chemistry
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votes
1
answer
48
views
How can the molecular structure of a liquid crystal be manipulated to alter its optical properties, such as birefringence and polarization, for potential applications in display technology?
asked
Feb 10
in
Physical Chemistry
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votes
1
answer
29
views
How can the chemical industry minimize its environmental impact by reducing the hazardous pollutants in their wastewater before its disposal?
asked
Feb 6
in
Environmental Chemistry
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votes
1
answer
43
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Calculate the standard enthalpy change (∆H°) for the dissolution of 5 grams of table salt (NaCl) in water at 298 kelvin. The molar mass of NaCl is 58.44 g/mol and the heat capacity of the solution is 4.18 J/gK.
asked
Feb 3
in
Chemical thermodynamics
+1
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1
answer
100
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What is the concentration of lead (Pb) in a water sample collected from a nearby river, using atomic absorption spectroscopy?
asked
Jan 30
in
Analytical Chemistry
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1
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66
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Calculate the enthalpy change for the combustion of methane gas if 10 grams of methane is burned completely in the presence of excess oxygen gas. Given the following balanced chemical equation: CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)The standard enthalpy of formation for methane gas is -74.8 kJ/mol, carbon dioxide gas is -393.5 kJ/mol, and water vapor is -241.8 kJ/mol.
asked
Jan 23
in
Chemical thermodynamics
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votes
1
answer
61
views
What is the two-factor theory of emotion, and how does it explain emotional experiences?
asked
Jan 20
in
Psychology
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1
answer
36
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Where did Robert Sternberg develop his triangular theory of love?
asked
Jan 20
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Psychology
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1
answer
44
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When can the use of punishment be appropriate in shaping behaviour?
asked
Jan 20
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Psychology
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1
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91
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Why do organisational psychologists study the behaviour of employees in the workplace?
asked
Jan 20
in
Psychology
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1
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116
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Why is Milgram's obedience study still relevant today?
asked
Jan 20
in
Psychology
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