Recent activity by MaribelLeepe

1 answer 29 views

What is the step-by-step reaction mechanism for the preparation of 2-chloro-4-nitroaniline from aniline and chlorine gas, and what are the optimal conditions required to yield a high conversion rate?

asked Feb 22 in Chemical synthesis

1 answer 27 views

How does the orientation of reactant molecules affect the rate of a chemical reaction and what experimental methods can be used to investigate this effect?

answered Feb 22 in Chemical kinetics

1 answer 38 views

What is the optimum temperature and ratio of reactants needed to achieve maximum yield in the synthesis of polyacrylonitrile from acrylonitrile monomer using free-radical polymerization?

answered Feb 22 in Chemical synthesis

1 answer 23 views

What is the mechanism of the nucleophilic substitution reaction between bromomethane and ammonia?

asked Feb 21 in Organic Chemistry

1 answer 38 views

What is the mechanism behind the drug-drug interaction between Warfarin and Aspirin, and how does this interaction affect the efficacy and safety of both drugs? Provide a detailed explanation supported by scientific evidence.

answered Feb 19 in Medicinal Chemistry

1 answer 49 views

How does the coordination chemistry of lanthanides and actinides differ from that of transition metals, and what are the implications of these differences on their chemical and physical properties?

asked Feb 19 in Coordination Chemistry

1 answer 32 views

What is the bond order of the nitrogen molecule (N2) based on its molecular orbital diagram?

answered Feb 18 in Chemical bonding

1 answer 39 views

How does the absorption of light by a molecule lead to electronic excitations and what are the subsequent photophysical and photochemical processes that occur in the excited state?

asked Feb 17 in Quantum Chemistry

1 answer 36 views

What factors affect the rate of a catalytic reaction and how do they impact the performance of the catalyst? Provide examples of different catalytic reactions and explain how the factors at play in each reaction affect the rate of the reaction.

answered Feb 14 in Physical Chemistry

1 answer 24 views

What is the difference between primary, secondary, and tertiary amines in terms of their synthesis and properties? Provide examples of each and explain their reactivity with electrophiles.

asked Feb 14 in Organic Chemistry

1 answer 35 views

How can the use of photocatalysts assist in the degradation of air pollutants such as volatile organic compounds (VOCs) and nitrogen oxides (NOx) in urban environments?

answered Feb 14 in PhotoChemistry

1 answer 70 views

How can the process parameters (such as temperature, pressure, and reaction time) be optimized to improve the yield and quality of high-density polyethylene production using a slurry-based polymerization reaction?

answered Feb 10 in Chemical engineering

1 answer 49 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?

answered Feb 6 in Polymer Chemistry

1 answer 40 views

How can inadequate training for chemistry teachers affect the quality of education in student learning and performance in chemistry?

asked Feb 6 in Chemical education

1 answer 43 views

How can different types of diisocyanates and polyols be optimally combined to synthesize polyurethane with desirable mechanical, thermal, and chemical properties?

answered Feb 6 in Chemical synthesis

1 answer 41 views

How can chemistry students be better educated on the importance and implementation of safety protocols in the laboratory to prevent accidents and injuries?

asked Feb 4 in Chemical education

1 answer 50 views

Calculate the surface tension of a liquid whose weight is 0.1 N and the length of a wire that floats on the surface of the liquid is 20 cm. The density of the liquid is 1.2 g/cm³.

asked Feb 3 in Surface Chemistry

1 answer 77 views

Calculate the standard enthalpy and entropy change for the reaction, given the following information:2 H2(g) + O2(g) → 2 H2O(g)∆H°f [H2O(g)] = -241.8 kJ/mol∆H°f [H2(g)] = 0 kJ/mol∆H°f [O2(g)] = 0 kJ/mol∆S° [H2O(g)] = 188.8 J/Kmol∆S° [H2(g)] = 130.7 J/Kmol∆S° [O2(g)] = 205.2 J/KmolAssuming that all heat capacities are independent of temperature, calculate ∆S°rxn and ∆H°rxn for this reaction.

answered Feb 3 in Inorganic Chemistry

1 answer 96 views

What is the electronic structure and composition of the first excited state of the ethylene molecule (C2H4) using time-dependent density functional theory?

answered Jan 31 in Computational Chemistry

1 answer 73 views

How can the concentration of a specific substance in a sample be determined using colorimetry? Provide a detailed stepwise procedure for the same and explain the underlying principle behind it.

asked Jan 29 in Analytical Chemistry

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