Recent activity by Lavonda96B02

1 answer 21 views

What is the optimum reaction conditions to prepare 2,4,6-trinitrotoluene from toluene and nitric acid in terms of temperature, concentration, and reaction time to obtain a maximum yield of the product?

asked 3 days ago in Chemical synthesis

1 answer 20 views

How do the photochemical properties of lanthanide complexes differ from other transition metal complexes? Provide a detailed explanation of the factors that contribute to these differences and their potential applications in photochemical processes.

answered 4 days ago in PhotoChemistry

1 answer 20 views

What is the optimal stoichiometric ratio of adipic acid and hexamethylenediamine for the synthesis of nylon-6,6 and how does varying this ratio affect the yield and properties of the final product?

answered 4 days ago in Chemical synthesis

1 answer 24 views

What is the hybridization of oxygen in the molecule H2O?

answered 5 days ago in Chemical bonding

1 answer 28 views

How does the band gap of a material change when the size of the unit cell is varied using density functional theory calculations?

answered Feb 17 in Computational Chemistry

1 answer 23 views

What is the mechanism for the addition reaction between an alkene and hydrogen bromide (HBr) in the presence of peroxide (ROOR)?

asked Feb 17 in Organic Chemistry

1 answer 25 views

How can we predict the chemical reactivity and selectivity of a molecule using quantum chemical calculations?

answered Feb 14 in Quantum Chemistry

1 answer 26 views

What factors affect the phosphorescence efficiency of a material, and how do these factors relate to the molecular structure of the material?

answered Feb 14 in PhotoChemistry

1 answer 10 views

How do persistent organic pollutants (POPs) accumulate in the food chain and what are the potential health and environmental impacts of their accumulation?

asked Feb 14 in Environmental Chemistry

1 answer 10 views

How can we design antiviral drugs that specifically target the spike proteins of SARS-CoV-2 virus without affecting the host cells?

answered Feb 12 in Medicinal Chemistry

1 answer 48 views

How can the process of producing polymers be optimized to increase production efficiency without compromising the quality of the final product?

answered Feb 10 in Chemical engineering

1 answer 33 views

How can students in rural areas with limited access to chemistry-related extracurricular activities still develop a strong foundation in chemistry and succeed academically?

answered Feb 5 in Chemical education

1 answer 30 views

How can quantum mechanics be applied to develop qubits for use in quantum computing, and what are the advantages and challenges of using qubits compared to classical binary digits?

asked Feb 5 in Quantum Chemistry

1 answer 52 views

Determine the acidity or basicity of the following molecules: ammonia (NH3), hydrogen chloride (HCl), water (H2O), and carbon dioxide (CO2). Rank them in order of increasing acidity or increasing basicity and explain your reasoning.

answered Feb 4 in Chemical bonding

1 answer 46 views

Design a heat exchanger that can transfer heat from a 10,000 L/h hot water stream at 80°C to a 5,000 L/h cold water stream at 20°C with a maximum temperature difference of 10°C. Calculate the required heat transfer area and select appropriate materials for the heat exchanger components based on the fluids' properties and operating conditions.

asked Feb 4 in Chemical engineering

1 answer 39 views

Calculate the zeta potential of a colloidal particle, given that the particle has a charge of -3.2 × 10^-19 C, a diameter of 250 nm, and is suspended in a solution with a dielectric constant of 78.3.

answered Feb 3 in Surface Chemistry

1 answer 58 views

Calculate the standard enthalpy change for the fusion reaction of 1 mole of ice at 0°C to 1 mole of liquid water at 0°C. Given the standard enthalpy of fusion of water is 6.02 kJ/mol and the specific heat capacity of water is 4.18 J/(g·°C).

answered Feb 3 in Chemical thermodynamics

1 answer 41 views

Calculate the standard enthalpy change for the combustion of 1 mole of propane gas (C3H8) at standard conditions using the following balanced chemical equation: C3H8(g) + 5O2(g) -> 3CO2(g) + 4H2O(l)Given the standard enthalpy of formation values at 298K for C3H8(g), CO2(g), and H2O(l) as -103.8, -393.5, and -285.8 kJ/mol respectively, calculate the standard enthalpy change for the combustion reaction.

asked Feb 3 in Chemical thermodynamics

1 answer 51 views

Calculate the pH of a 0.1 M solution of acetic acid (Ka = 1.8 x 10^-5).

asked Feb 3 in Chemical reactions

1 answer 90 views

What is the effect of different functional groups on the surface properties of a graphene sheet using Density functional theory calculations?

asked Jan 31 in Computational Chemistry

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