Recent activity by RondaSkeyhil

1 answer 17 views

How does the size and shape of nanomaterials affect their catalytic activity for a specific reaction?

answered 1 day ago in Materials Chemistry

1 answer 16 views

What is the relationship between the structure and electronic properties of metal-organic frameworks, and how can quantum chemistry be used to predict magnetic properties of these materials?

asked 1 day ago in Quantum Chemistry

1 answer 34 views

How does the mechanism of chain scission affect the degradation and stability of polymer materials?

answered 5 days ago in Polymer Chemistry

1 answer 23 views

How does the intensity of light affect the rate of a chemical reaction between chlorine and iodine?

answered 5 days ago in Chemical kinetics

1 answer 26 views

What is the overall reaction mechanism of an electrophilic addition reaction of HBr to propene? Draw the step-by-step mechanism and explain why this reaction follows Markovnikov's rule.

asked 5 days ago in Organic Chemistry

1 answer 29 views

What is the effect of different polymer-based packaging materials on the environment and how can we design more sustainable packaging materials?

answered 6 days ago in Polymer Chemistry

1 answer 26 views

What are the possible resonance structures of the carbonate ion (CO3-2) and how do they contribute to its stability?

answered Feb 18 in Chemical bonding

1 answer 23 views

What is the mechanism for the acid-catalyzed cleavage of an ether with HBr, and how does it differentiate between primary, secondary, and tertiary ethers? Provide an example of the reaction and explain the stereochemistry of the product formed.

asked Feb 17 in Organic Chemistry

1 answer 24 views

How does the absorption spectra of a dye or pigment change with changing pH?

answered Feb 17 in PhotoChemistry

1 answer 34 views

What type of hybrid orbitals are present in the molecule of formaldehyde (H2CO)?

asked Feb 13 in Chemical bonding

1 answer 29 views

What type of chemical bond is formed between two atoms of sodium and one atom of chlorine in a sodium chloride molecule, and how is it determined?

answered Feb 13 in Chemical bonding

1 answer 40 views

How does the concentration of nitrogen and phosphorus compounds contribute to the process of eutrophication in aquatic ecosystems, and what are the potential negative impacts on the ecosystem and human health?

asked Feb 13 in Environmental Chemistry

1 answer 37 views

What is the percentage purity of a given sample of aspirin when the melting point is determined to be 135°C? The literature melting point range for pure aspirin is 135-136°C.

answered Feb 12 in Analytical Chemistry

1 answer 5 views

How can we design a system that produces a specific flavor compound efficiently and economically, while also ensuring the safety of the workers and the environment?

answered Feb 12 in Chemical engineering

1 answer 43 views

How do the density functional theory calculations predict changes in the surface properties of a metal with the addition of a certain amount of a dopant element?

asked Feb 12 in Computational Chemistry

1 answer 38 views

How can the process for the production of polymers be optimized to increase the yield of the desired polymer while minimizing the formation of unintended byproducts?

asked Feb 10 in Chemical engineering

1 answer 38 views

How can the compatibility between two polymers be improved when creating a polymer blend for a specific application, and what are the key factors in determining their compatibility?

asked Feb 6 in Polymer Chemistry

1 answer 38 views

How can chemistry students effectively learn and apply practical skills when faced with limited opportunities for hands-on experimentation due to resource constraints in their learning environment?

asked Feb 4 in Chemical education

1 answer 30 views

Calculate the standard enthalpy change for the phase transition reaction of solid carbon dioxide (dry ice) at -78.5°C to gaseous carbon dioxide at 1 atm and 25°C, given the following information: The standard enthalpy of fusion of solid carbon dioxide is 8.4 kJ/mol and the standard enthalpy of vaporization of gaseous carbon dioxide is 22.1 kJ/mol.

asked Feb 3 in Chemical thermodynamics

1 answer 53 views

Calculate the standard enthalpy change for the combustion of methane (CH4) at constant pressure, given that the standard enthalpies of formation are -74.87 kJ/mol for methane and -393.51 kJ/mol for carbon dioxide (CO2), and 2H2(g) + O2(g) → 2H2O(l) has a standard enthalpy change of -571.66 kJ/mol.

asked Feb 3 in Chemical thermodynamics

Categories