Recent activity by MarielScully

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What is the relationship between the size and shape of a quantum dot or quantum well and its electronic and optical properties, and how can these properties be calculated using quantum chemistry methods?

answered 2 days ago in Quantum Chemistry

1 answer 21 views

What is the Lewis structure for the methane (CH4) molecule?

asked 6 days ago in Chemical bonding

1 answer 30 views

How does the body biosynthesize the non-essential amino acids and what are the chemical reactions involved?

asked Feb 20 in BioChemistry

1 answer 26 views

How does the electron transfer process occur in the redox reaction between copper and silver ions, and what is the role of Quantum Chemistry in understanding the mechanism of electron transfer?

asked Feb 20 in Quantum Chemistry

1 answer 29 views

What is the corrosion current density of an iron metal in a 0.5 M hydrochloric acid solution when the measured electrochemical cell current is 2.5 mA and the surface area of the iron electrode is 5 cm²? All other experimental conditions remain constant.

answered Feb 19 in ElectroChemistry

1 answer 26 views

How does the concentration of salt affect the formation of protein-protein complexes?

asked Feb 19 in BioChemistry

1 answer 29 views

How does the choice of photosensitizer affect the efficiency of a photochemical reaction?

asked Feb 18 in PhotoChemistry

1 answer 26 views

How does the absorption of light by a molecule lead to photochemical reactions and influence its photophysical properties?

answered Feb 17 in Quantum Chemistry

1 answer 39 views

How do the metal ions in metalloproteins affect the protein structure and function, and what factors influence the metal ion coordination and reactivity in metalloenzymes?

asked Feb 13 in Coordination Chemistry

1 answer 44 views

What are the major air pollutants that can harm human health, and how can their concentration be measured and minimized in urban areas?

answered Feb 13 in Environmental Chemistry

1 answer 46 views

How does the reaction rate of the chemical reaction (mention the reaction) in the presence of catalyst (mention the catalyst) vary with changes in pH (mention the pH range)?

asked Feb 13 in Chemical kinetics

1 answer 47 views

How can we design a drug that targets the synaptic vesicle glycoprotein 2A (SV2A) to treat neurological disorders such as epilepsy, without causing toxicity or unwanted side effects?

answered Feb 12 in Medicinal Chemistry

1 answer 34 views

How can chemistry students gain practical experience in the field and obtain competitive internships or job opportunities despite the limited availability?

asked Feb 5 in Chemical education

1 answer 38 views

How can chemical engineers develop a process for the production of a food additive that meets safety regulations and produces a consistently high-quality product?

asked Feb 4 in Chemical engineering

1 answer 65 views

Here's a question for the student to solve:What is the bond order between nitrogen atoms in a nitrogen gas molecule, and how does this bond order affect the properties of the molecule?

asked Feb 4 in Chemical education

1 answer 47 views

Here is a precise question for the student to solve:A chemical reaction occurs in a closed system that results in a change in temperature, but without any change in volume. Using non-equilibrium thermodynamics and irreversible processes, determine the amount of heat absorbed or released by the reaction if the entropy change is known to be 25 J/K.

asked Feb 4 in Physical Chemistry

1 answer 38 views

Calculate the standard enthalpy change for the melting of 10 grams of ice at -10°C to liquid water at 20°C, given the specific heat capacity of water is 4.18 J/g°C and the enthalpy of fusion of water is 6.01 kJ/mol.

asked Feb 3 in Chemical thermodynamics

1 answer 79 views

How does the size of a gold nanoparticle affect its stability and interaction with water molecules? Perform a molecular dynamics simulation using appropriate software to investigate the behavior of gold nanoparticles of varying sizes in water. Analyze your results to determine the correlation between nanoparticle size and stability, and provide an explanation for any observed trends.

answered Jan 31 in Computational Chemistry

1 answer 78 views

What is the concentration of iron (II) ions in a water sample with absorbance of 0.295 at a wavelength of 510 nm, given that the molar extinction coefficient of iron (II) ions is 11,300 M^-1cm^-1 at this wavelength? Use colorimetry to determine the solution.

answered Jan 30 in Analytical Chemistry

1 answer 93 views

Identify the unknown compound X using mass spectrometry data given below. The molecular ion peak of X is observed at m/z 120 with a relative intensity of 100%. Additionally, the following fragment peaks with their respective relative intensities were also observed: m/z 105 (40%), m/z 92 (15%), m/z 77 (10%), and m/z 65 (5%). What is the molecular formula of X and what is its structural formula?

asked Jan 30 in Analytical Chemistry

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