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What is the predicted bond angle in a water molecule and how is it determined using the VSEPR theory? Also, how does the bond angle of water molecule compare to that of ammonia molecule?
asked
Feb 22
in
Chemical bonding
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votes
1
answer
35
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What is the change in enthalpy for the reaction: 2H2 + O2 → 2H2O, given the following thermochemical equations and their respective enthalpy changes: 2H2 + O2 → 2H2O, ΔH = -484 kJ/mol H2 + ½O2 → H2O, ΔH = -286 kJ/mol
asked
Feb 20
in
Chemical reactions
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1
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43
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What is the effect of electron density and molecular orbital energies on the reactivity and selectivity of a given chemical reaction?
asked
Feb 20
in
Quantum Chemistry
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1
answer
33
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What is the crystal field splitting energy for an octahedral complex with ligand field stabilisation energy of 4000 cm^-1? Show the calculation and determine whether the complex will be high spin or low spin.
asked
Feb 19
in
Coordination Chemistry
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1
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28
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What is the bond strength of the oxygen to hydrogen bond in water and how does it compare to the bond strength of the carbon to hydrogen bond in methane? What factors contribute to these differences in bond strength between these two molecules?
asked
Feb 18
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Chemical bonding
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1
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40
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How can the use of prodrugs be optimized in the development of novel treatments for gastrointestinal diseases?
asked
Feb 14
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Medicinal Chemistry
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1
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63
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How can the self-assembly of supramolecular structures be controlled to create new functional materials with specific properties?
asked
Feb 10
in
Physical Chemistry
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1
answer
40
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How can students with limited access to laboratory equipment and facilities perform experiments to better understand concepts in chemistry?
asked
Feb 5
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Chemical education
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1
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77
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Calculate the standard enthalpy change for the combustion of methane (CH4) at constant pressure, given that the standard enthalpies of formation are -74.87 kJ/mol for methane and -393.51 kJ/mol for carbon dioxide (CO2), and 2H2(g) + O2(g) → 2H2O(l) has a standard enthalpy change of -571.66 kJ/mol.
asked
Feb 3
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Chemical thermodynamics
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1
answer
147
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What is an appropriate protecting group for a primary alcohol in the synthesis of an ester and why?
asked
Jan 31
in
Organic Chemistry
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1
answer
67
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Given the molecular formula and NMR spectrum of an unknown compound, can you identify the structure of the compound using nuclear magnetic resonance spectroscopy?
asked
Jan 29
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Analytical Chemistry
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1
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93
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Calculate the enthalpy of reduction for the reaction: Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)given that the standard enthalpy of formation of Fe2O3(s), CO(g), and CO2(g) are -824kJ/mol, -110.5kJ/mol, and -393.5kJ/mol respectively. Assume all reactants and products are in their standard states.
asked
Jan 23
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ThermoChemistry
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1
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65
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Calculate the change in entropy (ΔS) of the following reaction at 298 K:2SO2(g) + O2(g) → 2SO3(g) Given the standard molar entropies at 298 K: ΔS°(SO2,g) = 248.2 J/Kmol ΔS°(O2,g) = 205.0 J/Kmol ΔS°(SO3,g) = 256.2 J/Kmol
asked
Jan 23
in
Chemical thermodynamics
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votes
1
answer
39
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According to Alfred Adler's individual psychology, what motivates human behaviour?
asked
Jan 20
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Psychology
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1
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37
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How is eye-tracking technology used in user interface design?
asked
Jan 17
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Psychology
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1
answer
55
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What is critical thinking?
asked
Jan 17
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Psychology
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1
answer
36
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What are the limitations of psychoanalytic theory in understanding human sexuality?
asked
Jan 16
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Psychology
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votes
1
answer
64
views
What is reliability in data measurement?
asked
Jan 16
in
Psychology
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votes
1
answer
17
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According to terror management theory, what is mortality salience?
asked
Jan 16
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Psychology
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1
answer
85
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What is a theoretical model, and how is it different from a theory?
asked
Jan 16
in
Psychology
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