Recent activity by Steffen8339

1 answer 14 views

How does the selectivity of oxidation of hydrocarbons on metal surfaces change when the size of the metal nanoparticles is varied?

asked 1 day ago in Surface Chemistry

1 answer 19 views

How does the reaction rate of a chemical reaction affect its safety?

asked 3 days ago in Chemical kinetics

1 answer 22 views

How does the presence of reaction intermediates affect the rate of chemical reactions and what is the mechanism behind this phenomenon?

answered 3 days ago in Chemical kinetics

1 answer 22 views

What are the optimal reaction conditions (temperature, pressure, and concentration) required for the preparation of 2,4-dichloronitrobenzene from nitrobenzene and chlorine gas, and how do these conditions affect the yield of the reaction?

asked 3 days ago in Chemical synthesis

1 answer 21 views

How does the molecular weight of a polymer affect its rheological properties when it is in a molten state?

asked 4 days ago in Polymer Chemistry

1 answer 27 views

What is the pH of a 0.1 M solution of hydrochloric acid (HCl)? Given the ionization constant of HCl is 1.3 × 10^-6.

asked 5 days ago in Inorganic Chemistry

1 answer 24 views

What is the effect of different solvents (methanol, ethanol, and water) on the fluorescence emission of luminescent materials?

asked 6 days ago in PhotoChemistry

1 answer 36 views

How does the design of self-assembled supramolecular structures impact their stability and functionality? What are the key factors that influence the self-assembly of supramolecular architectures and how can they be optimized for specific applications?

answered 6 days ago in Physical Chemistry

1 answer 31 views

What is the critical micelle concentration (CMC) of sodium dodecyl sulfate (SDS) at a temperature of 25°C in water? How does the CMC vary with temperature? Also, explain the formation of micelles and their role in soap solutions.

asked 6 days ago in Surface Chemistry

1 answer 15 views

What is the bond dissociation energy of the carbon-hydrogen bond in methane?

answered Feb 18 in ThermoChemistry

1 answer 37 views

How does the binding of a transcription factor to DNA affect gene expression? Please provide a detailed explanation of the biochemical processes involved and any relevant examples.

asked Feb 17 in BioChemistry

1 answer 21 views

What is the balanced chemical equation for the preparation of 2,4-dichloronitrobenzene from nitrobenzene and chlorine gas, and how much of each reagent is required to produce 10 grams of the final product?

asked Feb 17 in Chemical synthesis

1 answer 14 views

What is the balanced chemical equation for the combustion of propane (C3H8)?

asked Feb 17 in Chemical reactions

1 answer 35 views

What is the predicted boiling point of a compound with a molecular weight of 100 g/mol and only London dispersion forces as the predominant intermolecular force?

asked Feb 14 in Chemical bonding

1 answer 24 views

How can we predict the catalytic activity and selectivity of a given catalyst using quantum chemistry calculations?

asked Feb 14 in Quantum Chemistry

1 answer 42 views

What are the major air pollutants that can harm human health, and how can their concentration be measured and minimized in urban areas?

asked Feb 13 in Environmental Chemistry

1 answer 50 views

How can we design and synthesize a new drug compound that will effectively target and bind to a specific enzyme or receptor, while minimizing off-target effects and maximizing therapeutic efficacy?

answered Feb 12 in Medicinal Chemistry

1 answer 41 views

How does the density functional theory predict the electronic transport properties of a given material and what factors influence the conductivity of the material?

asked Feb 12 in Computational Chemistry

1 answer 40 views

Calculate the standard enthalpy change for the reaction between calcium oxide (CaO) and water (H2O) to form calcium hydroxide (Ca(OH)2), given that all species are in their standard state and that the balanced chemical equation is:CaO(s) + H2O(l) → Ca(OH)2(s)The standard enthalpies of formation of CaO(s), H2O(l) and Ca(OH)2(s) are -635.1 kJ/mol, -285.8 kJ/mol, and -986.2 kJ/mol respectively.

asked Feb 3 in Chemical thermodynamics

1 answer 56 views

Calculate the standard enthalpy change for the precipitation reaction between lead(II) nitrate and sodium chloride to form lead(II) chloride and sodium nitrate. The balanced chemical equation for the reaction is:Pb(NO3)2 (aq) + 2NaCl (aq) → PbCl2 (s) + 2NaNO3 (aq)

answered Feb 3 in Chemical thermodynamics

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