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Answers by LenoreCheval
0
votes
29
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How does the size and shape of a nanoparticle affect its diffusion behavior in a liquid environment, and how can this be altered or controlled through manipulation of the nanoparticle structure using molecular dynamics simulations?
answered
1 day
ago
in
Computational Chemistry
0
votes
24
views
How does the rate of reaction affect the profitability of a chemical reaction in the production of a particular product? What is the optimum reaction rate that can maximize the profitability of the production process?
answered
3 days
ago
in
Chemical kinetics
0
votes
19
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What is the most efficient method for developing a process for the production of a high value specialty chemical with a yield of at least 85% and a purity of 99% or greater, while minimizing waste and reducing environmental impact?
answered
4 days
ago
in
Chemical engineering
0
votes
28
views
How does the chemical composition of nucleotides affect the efficiency of DNA repair and replication?
answered
Feb 18
in
BioChemistry
0
votes
29
views
What is the bond energy and bond strength of a chlorine molecule? Provide neutron scattering data to support your answer.
answered
Feb 18
in
Chemical bonding
0
votes
26
views
How does the temperature affect the adsorption of nitrogen gas on activated carbon and silica gel surfaces?
answered
Feb 17
in
Surface Chemistry
0
votes
39
views
How can the yields of ibuprofen be improved in the synthesis from 2-methylpropylbenzene and carbon dioxide?
answered
Feb 13
in
Chemical synthesis
0
votes
26
views
How can the properties of polymer-based smart materials be tailored to achieve specific functionalities in electronic devices?
answered
Feb 10
in
Polymer Chemistry
0
votes
34
views
How can the magnetic properties of different materials be investigated for their potential use in data storage devices like hard drives?
answered
Feb 7
in
Materials Chemistry
0
votes
47
views
Design a counter-current heat exchanger to cool 10,000 liters per hour of cyclohexane at 110°C down to 50°C, while heating 7,500 liters per hour of water at 25°C up to 80°C. The cyclohexane will be cooled by water which enters the heat exchanger at 90°C and exits at 60°C. The overall heat transfer coefficient is expected to be 1,000 W/m2K. Determine the required heat transfer area and the pressure drop across the heat exchanger.
answered
Feb 3
in
Chemical engineering
0
votes
52
views
Calculate the standard enthalpy change (∆H°) for the reaction: 2HCl(aq) + Na2CO3(aq) → CO2(g) + H2O(l) + 2NaCl(aq) given that the standard enthalpy of formation (∆H°f) for NaCl(aq), H2O(l) and CO2(g) are -407.3 kJ/mol, -285.8 kJ/mol and -393.5 kJ/mol respectively.
answered
Feb 3
in
Chemical thermodynamics
0
votes
44
views
Calculate the standard enthalpy change (∆H°) for the reaction: 2NH3(g) + 5O2(g) → 4NO(g) + 6H2O(l)Given the following bond dissociation energies (in kJ/mol):N≡N = 941, N-H = 391, O=O = 495, O-H = 464, N-O = 201, H-O-H = 464, N-H + O=O = 632, N=O = 607, and H-N≡N = 945.
answered
Feb 3
in
Quantum Chemistry
0
votes
82
views
What is the difference between benzene and toluene in terms of aromaticity and reactivity with electrophiles?
answered
Jan 31
in
Organic Chemistry
0
votes
84
views
What functional groups are present in compound X, as identified by infrared spectroscopy?
answered
Jan 30
in
Analytical Chemistry
0
votes
64
views
Calculate the lattice energy of potassium chloride (KCl) using Born-Haber cycle, given the following information:- Ionization energy of potassium (K) = 419 kJ/mol- Electron affinity of chlorine (Cl) = -348 kJ/mol- Heat of sublimation of potassium (K) = 89 kJ/mol- Enthalpy of formation of potassium chloride (KCl) = -436 kJ/mol
answered
Jan 23
in
Inorganic Chemistry
0
votes
63
views
Calculate the heat of sublimation of solid carbon dioxide (dry ice) given that the enthalpy of fusion of solid carbon dioxide is 8.6 kJ/mol and the enthalpy of vaporization of carbon dioxide gas is 22.8 kJ/mol. (Hint: The heat of sublimation of a substance is equal to the sum of its enthalpy of fusion and enthalpy of vaporization.)
answered
Jan 23
in
ThermoChemistry
0
votes
57
views
Calculate the formal charge of nitrogen in the molecule NO3-.
answered
Jan 23
in
Chemical bonding
0
votes
50
views
Calculate the enthalpy change for the combustion of methane gas (CH4) at standard conditions given the following information: 4 moles of methane gas is burned in excess oxygen gas (O2) to form carbon dioxide gas (CO2) and liquid water (H2O). The enthalpy change for the combustion of 1 mole of methane gas is -890.4 kJ/mol.
answered
Jan 23
in
Chemical thermodynamics
0
votes
39
views
According to social identity theory, what is the out-group?
answered
Jan 20
in
Psychology
0
votes
50
views
How does stereotype threat contribute to social erasure?
answered
Jan 20
in
Psychology
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