Recent activity by MarianneBarc

1 answer 21 views

How does the quantum confinement effect on the electronic and optical properties of CdSe/ZnS core-shell quantum dots of different sizes?

answered 3 days ago in Quantum Chemistry

1 answer 19 views

What is the mechanism involved in the preparation of phenylalanine from benzyl chloride and ammonia, and how can it be optimized to increase the yield of the product?

asked 3 days ago in Chemical synthesis

1 answer 20 views

What is the coordination geometry of a cobalt(III) complex with the empirical formula CoCl3(NH3)3? Use spectroscopic techniques to support your answer.

asked 6 days ago in Coordination Chemistry

1 answer 31 views

How does the coordination chemistry of lanthanide and actinide complexes differ from that of other transition metals?

asked 6 days ago in Coordination Chemistry

1 answer 25 views

How does the addition of a solvent affect the folding of a particular protein, and what parameters can be modified to optimize the folding process in molecular dynamics simulations?

answered Feb 17 in Computational Chemistry

1 answer 31 views

What factors affect the efficiency of photovoltaic materials in converting light energy into electrical energy, and how can these factors be optimized through modifications in the chemical structure and composition of the materials?

asked Feb 14 in PhotoChemistry

1 answer 27 views

How can we optimize the drug delivery system of a specific medication to improve its bioavailability and minimize toxicity in the body?

answered Feb 14 in Medicinal Chemistry

1 answer 40 views

How does insulin influence the synthesis and breakdown of glycogen in the liver, and what regulatory enzymes are involved in this process?

asked Feb 13 in BioChemistry

1 answer 44 views

How does eutrophication affect the concentration of dissolved oxygen in aquatic ecosystems and what are the consequences of low oxygen levels on the survival of aquatic organisms?

asked Feb 13 in Environmental Chemistry

1 answer 41 views

What is the effect of doping with various elements on the critical temperature and critical magnetic fields in superconducting materials?

asked Feb 12 in Materials Chemistry

1 answer 30 views

What is the effect of doping a graphene sheet with boron and nitrogen atoms using DFT calculations on its electronic properties, specifically on its band gap?

answered Feb 12 in Computational Chemistry

1 answer 30 views

How can the mechanical properties of polyethylene be improved through the modification of its processing conditions during extrusion?

answered Feb 10 in Polymer Chemistry

1 answer 41 views

How can magnetic nanoparticles be synthesized and characterized for efficient drug delivery?

asked Feb 6 in Materials Chemistry

1 answer 40 views

How can chemists modify the chemical structure of existing antibiotics to overcome drug-resistant bacterial infections like MRSA (Methicillin-Resistant Staphylococcus Aureus)?

asked Feb 5 in Medicinal Chemistry

1 answer 25 views

How can chemistry teachers provide adequate support for students with learning disabilities in the classroom to ensure their success in the subject?

asked Feb 5 in Chemical education

1 answer 27 views

How can chemistry students gain practical experience in the field when the availability of chemistry-related internships and job opportunities is limited?

asked Feb 5 in Chemical education

1 answer 47 views

Here's a precise problem for a chemistry student to solve in Organic Synthesis and Retrosynthesis:Develop a retrosynthesis approach to synthesize 2-methyl-1-phenylpropan-1-ol, starting from benzene, propene, and any other necessary reagents, explaining each step in the backward reaction sequence.

asked Feb 4 in Organic Chemistry

1 answer 45 views

Calculate the standard Gibbs free energy change ($\Delta G^{\circ}$) for the following reaction at 298 K:2Fe(s) + 3/2O2(g) → Fe2O3(s) Given: Standard enthalpy of formation of Fe2O3(s) = -822.2 kJ/molStandard enthalpy of formation of Fe(s) = 0 kJ/molStandard entropy change for the reaction = +87.4 J/mol K

answered Feb 3 in Chemical thermodynamics

1 answer 40 views

Calculate the standard enthalpy change for the vaporization of 100 g of water at 100°C given that the enthalpy of vaporization of water is 40.7 kJ/mol.

asked Feb 3 in Chemical thermodynamics

1 answer 54 views

Calculate the standard enthalpy change for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) to form sodium chloride (NaCl) and water (H2O) when 50.0 mL of 1.0 M HCl reacts with 50.0 mL of 1.0 M NaOH at 25°C.

answered Feb 3 in Chemical thermodynamics

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