Recent activity by CarmellaBibl

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How does the size and shape of a graphene nanoribbon affect its electronic band structure and optical properties, and how can these properties be optimized for potential use in electronic or photonic applications?

asked 1 day ago in Quantum Chemistry

1 answer 26 views

How does the presence of heavy metals, such as iron and aluminum, in acid mine drainage affect the acidity and overall water quality of surrounding bodies of water, and what steps can be taken to mitigate these impacts?

asked 3 days ago in Environmental Chemistry

1 answer 5 views

How does the presence and distribution of active sites on solid surfaces affect the rate of catalytic reactions in heterogeneous catalysis?

answered 3 days ago in Surface Chemistry

1 answer 29 views

How does the concentration of a reactant affect the reaction rate and potential safety hazards in a chemical reaction?

answered 6 days ago in Chemical kinetics

1 answer 20 views

How does the concentration of photosensitizer affect the rate of a photochemical reaction?

asked 6 days ago in PhotoChemistry

1 answer 29 views

How does the composition of a cell membrane affect its permeability to different molecules? Provide a detailed explanation with specific examples.

answered 6 days ago in BioChemistry

1 answer 25 views

What is the balanced chemical equation for the complete combustion of propane (C3H8), assuming it reacts with oxygen (O2) to form carbon dioxide (CO2) and water (H2O)?

answered Feb 17 in Chemical reactions

1 answer 35 views

How does the surface chemistry affect the adhesion of polymers to different substrates?

answered Feb 17 in Polymer Chemistry

1 answer 31 views

Using coordination chemistry, explain the color changes observed by adding aqueous ammonia to copper(II) sulfate solution.

answered Feb 13 in Coordination Chemistry

1 answer 39 views

How do the enzymes in the process of glycolysis regulate glucose metabolism, and how do changes in the levels and activity of these enzymes affect the production of ATP and synthesis of glucose in gluconeogenesis?

answered Feb 13 in BioChemistry

1 answer 38 views

How can the magnetic properties of a material be altered to make it more suitable for high-density data storage applications?

answered Feb 7 in Materials Chemistry

1 answer 37 views

How can chemistry teachers provide hands-on experiences to students in remote learning environments where in-person laboratory access is limited?

asked Feb 5 in Chemical education

1 answer 40 views

How can chemistry teachers provide better support for students with learning disabilities in the classroom to ensure they have equal access to learning opportunities and achieve success in the subject?

asked Feb 5 in Chemical education

1 answer 31 views

How can practical applications of chemistry be incorporated into the classroom to enhance the understanding and appreciation of the subject among students? Provide specific examples and explain how they can be implemented.

asked Feb 5 in Chemical education

1 answer 28 views

How can chemistry students get access to the latest research in the field and broaden their knowledge beyond what is taught in the classroom?

asked Feb 5 in Chemical education

1 answer 72 views

Design a distillation column for the separation of a binary mixture consisting of ethanol and water. The feed mixture contains 40 mol% ethanol and 60 mol% water, and the desired product purity is 95 mol% ethanol. The feed rate is 1000 kg/hr and the column should operate at atmospheric pressure. Calculate the number of theoretical plates required to achieve the desired separation and determine the corresponding height and diameter of the column.

asked Feb 3 in Chemical engineering

1 answer 12 views

Consider the reaction:$$\mathrm{N_2(g) + 3H_2(g) <=> 2NH_3(g)}$$At a certain temperature, the equilibrium constant $K_c$ for this reaction is $5.6 \times 10^{-5}$. If a reaction vessel initially contains only $\mathrm{0.10\,mol}$ of $\mathrm{N_2}$ and $\mathrm{0.20\,mol}$ of $\mathrm{H_2}$, what will be the equilibrium concentrations of $\mathrm{N_2}$, $\mathrm{H_2}$, and $\mathrm{NH_3}$ once the reaction reaches equilibrium?

answered Feb 3 in Chemical reactions

1 answer 11 views

Consider the molecule ozone (O3). Draw all possible resonance structures for ozone and explain how the resonance helps to stabilize the molecule.

answered Feb 3 in Chemical bonding

1 answer 53 views

How does changing the molecular geometry affect the electronic excited states and optical properties of a molecule?

asked Feb 3 in Quantum Chemistry

1 answer 73 views

How does the chemical mechanism of bioluminescence in organisms such as fireflies or jellyfish differ from that of synthetic photochemiluminescent systems?

answered Jan 31 in PhotoChemistry

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