Recent activity by AdeleStrothe

1 answer 34 views

How does the presence of adsorbates affect the surface properties of a metal using density functional theory calculations?

answered Feb 22 in Computational Chemistry

1 answer 26 views

How do the photochemical properties of chiral molecules differ from that of achiral molecules?

answered Feb 22 in PhotoChemistry

1 answer 28 views

How do the mechanical and chemical properties of biomaterials affect their suitability for use in tissue engineering applications?

answered Feb 20 in Materials Chemistry

1 answer 27 views

How does the degradation of microplastics in marine environments affect the release of harmful chemicals and their potential impact on the health of marine species?

answered Feb 19 in Environmental Chemistry

1 answer 40 views

What is the effect of the concentration of a detergent solution on its ability to lower the surface tension of water?

asked Feb 17 in Surface Chemistry

1 answer 49 views

What is the hybridization of nitrogen in the compound NH3?

answered Feb 13 in Inorganic Chemistry

1 answer 53 views

What type of bond exists between a carbon atom and an oxygen atom in CO2?

asked Feb 13 in Chemical bonding

1 answer 98 views

How can the synthesis and characterization of new materials be optimized for increased efficiency and cost-effectiveness in the removal of heavy metals from water?

answered Feb 11 in Materials Chemistry

1 answer 113 views

How can the synthesis and characterization of coordination compounds be used in the development of new chemotherapy drugs for cancer treatment? Provide a specific example of a coordination compound that has shown promising results in cancer treatment and explain how it works on a molecular level.

answered Feb 11 in Coordination Chemistry

1 answer 44 views

How can the chemical engineers optimize the reaction conditions and reactor design for the efficient extraction of flavors, while maintaining their chemical stability and sensory properties?

answered Feb 6 in Chemical engineering

1 answer 83 views

Calculate the standard free energy change (ΔG°) for the following redox reaction at 298K:Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) (Given: E°cell = 1.10V, F = 96,500 J/V.mol)

answered Feb 3 in Chemical thermodynamics

1 answer 131 views

Calculate the standard enthalpy change and entropy change for the reaction: 2Fe(s) + 3/2O2(g) -> Fe2O3(s) Given the standard enthalpies of formation of Fe(s), O2(g), and Fe2O3(s) are -0.44 kJ/mol, 0 kJ/mol, and -826 kJ/mol, respectively. Also, the standard molar entropy of Fe2O3(s) is 87.4 J/(mol K).

asked Feb 3 in Inorganic Chemistry

1 answer 85 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

1 answer 97 views

How does the concentration of a competitive inhibitor affect the Michaelis-Menten constant (Km) and maximum velocity (Vmax) of an enzyme-catalyzed reaction? Provide a detailed explanation and mathematical formula to support your answer.

answered Jan 30 in BioChemistry

1 answer 64 views

How can gas chromatography be used to determine the percentage composition of a mixture containing three unknown compounds?

asked Jan 29 in Analytical Chemistry

1 answer 63 views

How can capillary electrophoresis be used to determine the amino acid composition of a protein sample?

answered Jan 29 in Analytical Chemistry

1 answer 67 views

Calculate the enthalpy change for the adsorption of nitrogen gas on the surface of activated charcoal, given that the adsorption pressure is 1 atm at a temperature of 298 K. The quantity of nitrogen gas adsorbed is 0.01 moles per gram of charcoal, and the heat of combustion of the same amount of charcoal is -35.4 kJ/mol.

asked Jan 23 in ThermoChemistry

1 answer 67 views

Calculate the bond length between two oxygen atoms in an O2 molecule, given that the O-O bond energy is 498 kJ/mol and the reduced mass of the system is 15.9994 g/mol.

asked Jan 23 in Chemical bonding

1 answer 74 views

Based on the subtopic The effect of pH on the photochemical reaction rate, a possible precise question for a chemistry student to solve could be:How does the pH level affect the rate of the photochemical reaction between chlorophyll and 1,5-dihydroxynaphthalene?

answered Jan 23 in PhotoChemistry

1 answer 100 views

A student is given a galvanic cell consisting of a zinc electrode and a copper electrode. If the concentration of zinc ions in the zinc half-cell is 0.1 M and the concentration of copper ions in the copper half-cell is 1.0 M, what is the corrosion potential of the zinc electrode at standard conditions? (Assume that the standard electrode potential of copper is +0.34 V and that of zinc is -0.76 V.)

asked Jan 22 in ElectroChemistry

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