Recent activity by MargueriteWa

1 answer 33 views

How does the size and shape of a molecule or nanostructure affect its electronic transport properties?

asked Feb 24 in Quantum Chemistry

1 answer 30 views

How does the rate of a photochemical reaction vary with changes in the polarity of the solvent used? Provide experimental evidence to support your answer.

answered Feb 22 in PhotoChemistry

1 answer 31 views

What is the effect of the molecular weight of a polymer on its physical properties, such as viscosity and elasticity?

answered Feb 21 in Physical Chemistry

1 answer 37 views

How does the binding affinity between carbohydrates and proteins affect the recognition and signaling processes in biological systems?

asked Feb 17 in BioChemistry

1 answer 41 views

How can we modify the chemical structure of existing pharmaceutical drugs to improve their effectiveness in treating gastrointestinal diseases, such as inflammatory bowel disease and acid reflux?

asked Feb 13 in Medicinal Chemistry

1 answer 85 views

What is the effect of ligand substitution on the photochemical properties of coordination compounds?

asked Feb 13 in PhotoChemistry

1 answer 53 views

How do intermolecular interactions and solvation effects affect the stability of drug molecules in aqueous solutions?

asked Feb 13 in Quantum Chemistry

1 answer 55 views

How can we design a sustainable process for the production of fragrances using biobased feedstocks instead of the commonly used petroleum-based feedstocks, while achieving similar or superior scent qualities?

asked Feb 12 in Chemical engineering

1 answer 54 views

How does the coordination chemistry of metalloenzymes contribute to their catalytic activity and specificity? Provide a detailed explanation with examples of at least two metalloenzymes.

asked Feb 12 in Coordination Chemistry

1 answer 63 views

How can the production of sustainable surfactants be optimized for maximum yield and minimal environmental impact in a chemical engineering system?

answered Feb 10 in Chemical engineering

1 answer 43 views

How can the mechanical and chemical properties of polymer-based biomaterials for tissue engineering be optimized to enhance their compatibility with biological tissues and improve their long-term performance as implantable devices?

asked Feb 7 in Polymer Chemistry

1 answer 69 views

Calculate the standard enthalpy change for the fusion of ice at 0°C to liquid water at 0°C, given that the enthalpy of fusion of ice is 6.01 kJ/mol and the molar mass of water is 18.015 g/mol.

answered Feb 3 in Chemical thermodynamics

1 answer 140 views

What are the photochemical properties that allow bioluminescent organisms to produce light, and how could this knowledge be applied in the development of new imaging technologies?

answered Jan 31 in PhotoChemistry

1 answer 89 views

Calculate the standard enthalpy of formation (ΔHf°) for hydrogen peroxide using quantum chemistry calculations.

answered Jan 31 in Quantum Chemistry

1 answer 93 views

What is the concentration of a specific compound in a given sample using liquid chromatography?

answered Jan 30 in Analytical Chemistry

1 answer 21 views

Calculate the heat of mixing when 100 mL of 0.2 M HCl is mixed with 100 mL of 0.1 M NaOH, assuming that the density of the resulting solution is 1 g/mL and the specific heat capacity is 4.18 J/g℃.

asked Jan 23 in ThermoChemistry

1 answer 65 views

Calculate the heat of formation of carbon dioxide (CO2) given the following information: heat of formation of C(graphite) = 0 kJ/mol, heat of formation of O2(g) = 0 kJ/mol, and heat of combustion of graphite = -393.5 kJ/mol.

answered Jan 23 in Chemical bonding

1 answer 79 views

Calculate the entropy change (ΔS) for the combustion of methane gas (CH4) at constant pressure and standard conditions, given the following data: C(s) + O2(g) → CO2(g) ΔS° = -394 J/K·mol 2H2(g) + O2(g) → 2H2O(l) ΔS° = -237 J/K·mol CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) ΔH° = -802 kJ/mol

asked Jan 23 in Chemical thermodynamics

1 answer 80 views

Calculate the enthalpy change for the oxidation of 5 moles of hydrogen gas using the standard enthalpies of formation of water and hydrogen gas.

asked Jan 23 in ThermoChemistry

1 answer 80 views

Calculate the amount of heat released when 0.5 moles of propane, C3H8, combust completely in oxygen gas, O2, according to the following balanced equation:C3H8(g) + 5O2(g) -> 3CO2(g) + 4H2O(l), ∆H = -2220 kJ/mol.

asked Jan 23 in ThermoChemistry

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