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1
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28
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What is the relationship between the structure of a luminescent material and its photochemical properties?
asked
Feb 24
in
PhotoChemistry
0
votes
1
answer
29
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What is the bond enthalpy of the carbon-hydrogen bond in methane (CH4)? Provide calculations to support your answer.
asked
Feb 18
in
Chemical bonding
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votes
1
answer
33
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What is the boiling point of a substance with dipole-dipole interactions, compared to a substance with only London dispersion forces? Provide an explanation for the difference observed.
asked
Feb 17
in
Chemical bonding
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1
answer
48
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What hybrid orbitals are present in the molecule CH4, and what is the bond angle between each of the hydrogen atoms?
asked
Feb 13
in
Chemical bonding
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1
answer
90
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How does changing the pH affect the equilibrium position of a redox reaction between iron (II) and dichromate ions in acidic and basic solutions? Provide a balanced chemical equation and explain your reasoning using Le Chatelier's principle.
asked
Feb 13
in
Chemical equilibrium
0
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1
answer
71
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How do Chlorofluorocarbons (CFCs) specifically degrade the ozone layer and what chemical reactions occur in the process?
asked
Feb 12
in
Environmental Chemistry
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1
answer
45
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How can the chemical engineer optimize the production process of a specific food additive while ensuring its purity and safety for human consumption?
asked
Feb 6
in
Chemical engineering
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1
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61
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How can the adsorption capacity of zeolites be optimized for specific industrial applications using computational studies?
asked
Feb 6
in
Computational Chemistry
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1
answer
40
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How can the activity of a catalyst be optimized for a specific reaction?
asked
Feb 6
in
Physical Chemistry
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1
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55
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Calculate the standard enthalpy of formation of ammonia gas (NH3) using the following information:- Standard enthalpy of formation for nitrogen gas (N2) = 0 kJ/mol- Standard enthalpy of formation for hydrogen gas (H2) = 0 kJ/mol- Standard enthalpy of formation for ammonia gas (NH3) = -46 kJ/mol
asked
Feb 3
in
Chemical thermodynamics
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1
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119
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What specific study strategies can a chemistry student implement to better prepare for exams and improve their performance in the subject?
asked
Jan 30
in
Chemical education
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1
answer
73
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Identify the functional group present in an unknown compound using UV-Vis spectroscopy and provide a detailed explanation of the absorption band observed in the spectrum.
asked
Jan 30
in
Analytical Chemistry
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votes
1
answer
63
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How can the presence of specific ions in a solution be identified using ion-selective electrodes and what techniques/tools are needed to accurately measure their concentration?
asked
Jan 29
in
Analytical Chemistry
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1
answer
64
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How can the concentration of chloride ions be quantified in a given water sample using potentiometry?
asked
Jan 29
in
Analytical Chemistry
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1
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68
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Calculate the enthalpy of adsorption when 2.0 grams of activated charcoal adsorbs 25 mL of methane gas at a constant temperature of 298 K, given that the pressure is 1 atm. Assume ideal gas behavior for methane.
asked
Jan 23
in
ThermoChemistry
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votes
1
answer
53
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Calculate the enthalpy change for the hydrolysis of 2 moles of sucrose (C12H22O11) if it releases 5184 kJ/mol of energy.
asked
Jan 23
in
ThermoChemistry
+1
vote
1
answer
75
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What is the oxidation state of sulfur in the compound sodium sulfite (Na2SO3)?
asked
Jan 21
in
Inorganic Chemistry
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1
answer
81
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Who were the main figures of Gestalt psychology?
asked
Jan 20
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Psychology
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1
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59
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What is the role of cross-cultural psychology in international relations?
asked
Jan 16
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Psychology
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1
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44
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Compare the potential benefits and risks of using stimulants for cognitive enhancement.
asked
Jan 16
in
Psychology
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