Recent activity by AlexandraV63

1 answer 20 views

What is the most effective renewable energy source that can replace non-renewable energy sources like fossil fuels, and what is the impact of its utilization on the environment?

answered 4 days ago in Environmental Chemistry

1 answer 22 views

How do the reaction conditions (temperature, initiator, solvent, etc.) affect the molecular weight distribution of a polymer produced through free radical polymerization of styrene?

asked 4 days ago in Organic Chemistry

1 answer 24 views

What is the molecular geometry of sulfur dioxide (SO2) and what is the bond angle between the sulfur and oxygen atoms?

answered 4 days ago in Chemical bonding

1 answer 25 views

How does the intensity of the infrared spectrum produced by a molecule change when the molecule undergoes a bond vibration?

answered 5 days ago in Physical Chemistry

1 answer 18 views

What is the mechanism of formation of N-methylacetamide from N-methylamine and acetic anhydride?

asked 5 days ago in Organic Chemistry

1 answer 28 views

What is the effect of varying temperature on the selectivity of the reaction between compound A and compound B, and how does this relate to the reaction rate? Provide evidence and explain the mechanism behind any observed changes in selectivity.

asked 5 days ago in Chemical kinetics

1 answer 24 views

What is the effect of temperature on the rate of the reaction between hydrochloric acid and magnesium ribbon?

answered 5 days ago in Chemical kinetics

1 answer 27 views

How does the choice of exchange-correlation functional in density functional theory calculations affect the prediction of reaction barriers and energies for the catalytic reaction between ethene and hydrogen over a Pt surface?

answered Feb 18 in Computational Chemistry

1 answer 31 views

How does the change in the electronic and optical properties of perovskite materials affect the efficiency of solar cells made from these materials?

answered Feb 18 in Quantum Chemistry

1 answer 36 views

How does the absorption of light by molecules impact their electronic structure and subsequent photochemical reactions in complex materials, such as those found in solar cells?

asked Feb 17 in Quantum Chemistry

1 answer 22 views

How does surface modification of nanoparticles affect their stability and reactivity in different chemical environments?

asked Feb 17 in Surface Chemistry

1 answer 34 views

How does the regulation of the enzyme phosphofructokinase-1 (PFK-1) impact carbohydrate metabolism in the liver?

asked Feb 14 in BioChemistry

1 answer 38 views

What is the boiling point of magnesium oxide (MgO) at a pressure of 1 atm?

asked Feb 13 in Inorganic Chemistry

1 answer 33 views

What are the advantages and limitations of using gel permeation chromatography for the characterization of a polymer sample?

answered Feb 13 in Polymer Chemistry

1 answer 26 views

What is the current density in an electrochemical cell where a current of 5 amperes is passed through a copper electrode with a surface area of 0.1 square meters for 10 minutes? The half-cell reaction is: Cu2+ + 2 e- -> Cu.

answered Feb 12 in ElectroChemistry

1 answer 12 views

How can the principles of medicinal chemistry be applied to design drugs that selectively target and destroy cancer cells while sparing normal healthy cells?

answered Feb 10 in Medicinal Chemistry

1 answer 30 views

How can medicinal chemists utilize structure-activity relationship (SAR) studies to design new small molecule drugs that selectively target specific immune cells involved in autoimmune diseases, while minimizing off-target effects and toxicity?

asked Feb 5 in Medicinal Chemistry

1 answer 32 views

How can chemistry students improve their understanding and retention of complex chemical concepts, such as the relationship between thermodynamics and kinetics in chemical reactions, and apply them to real-world scenarios?

answered Feb 5 in Chemical education

1 answer 46 views

Calculate the standard enthalpy of formation for magnesium oxide (MgO) given the standard enthalpy of formation for magnesium (Mg) is -601.8 kJ/mol and the standard enthalpy of formation for oxygen (O₂) is 0 kJ/mol.

answered Feb 3 in ThermoChemistry

1 answer 39 views

Calculate the standard enthalpy change and the standard entropy change for the reaction: 2HCl(g) + Mg(s) → MgCl2(s) + H2(g) Given the following standard enthalpy of formation values: - HCl(g) = -92.31 kJ/mol - MgCl2(s) = -641.8 kJ/mol - H2(g) = 0 kJ/mol - Mg(s) = 0 kJ/mol Also given the following standard molar entropy values:- HCl(g) = 186.9 J/Kmol - MgCl2(s) = 138.53 J/Kmol - H2(g) = 130.7 J/Kmol - Mg(s) = 32.85 J/Kmol

answered Feb 3 in Inorganic Chemistry

Recent activity by AlexandraV63

Categories