Questions by AugustusQsj

0 votes

1 answer 24 views

What is the optimal reaction conditions, including temperature, pressure, and catalyst selection, for the synthesis of polyethylene oxide with a targeted molecular weight using ethylene oxide as the monomer?

asked 3 days ago in Chemical synthesis

0 votes

1 answer 8 views

How does the binding of substrates to the active site of an enzyme affect the catalytic reaction rate? Use computational chemistry methods to compare the reaction rate of a free substrate versus a substrate that is bound to the enzyme's active site.

asked Feb 17 in Computational Chemistry

0 votes

1 answer 18 views

What is the effect of temperature and pressure on the adsorption of gases on solid surfaces? Provide an explanation with appropriate examples and also discuss the applications of this phenomenon in industries.

asked Feb 17 in Surface Chemistry

0 votes

1 answer 22 views

How does the addition of electron-donating or electron-withdrawing substituents affect the electronic and optical properties of conjugated polymers, and how can these changes be accurately calculated using quantum chemistry methods?

asked Feb 17 in Quantum Chemistry

0 votes

1 answer 16 views

How does the addition of a catalyst affect the equilibrium position of a chemical reaction and how can it be calculated mathematically? Use the reaction A + B ⇌ C + D as an example and show step-by-step calculations for the effect of adding a catalyst.

asked Feb 17 in Chemical equilibrium

0 votes

1 answer 16 views

How does passivation treat corrosion on the surface of iron and steel, and what factors affect the rate and degree of passivation?

asked Feb 14 in Surface Chemistry

0 votes

1 answer 32 views

What is the hybridization state and orbital geometry of the carbon atom in the molecule CH3OH?

asked Feb 13 in Chemical bonding

0 votes

1 answer 11 views

How does the presence of cholesterol affect the signaling and metabolism of lipids in cells? Provide a detailed explanation of the molecular mechanisms involved and their potential implications on cellular function.

asked Feb 12 in BioChemistry

0 votes

1 answer 30 views

How can the mechanical properties of polymer-based composites be optimized for aerospace applications, taking into account the requirements for weight reduction, durability, and heat resistance?

asked Feb 10 in Polymer Chemistry

0 votes

1 answer 37 views

How can insufficient emphasis on environmental chemistry in chemical education be addressed to promote awareness and understanding of the impact of chemical substances on the environment?

asked Feb 6 in Chemical education

0 votes

1 answer 50 views

Calculate the standard enthalpy of formation of methane gas (CH4) given the following data:- ∆H°combustion of methane = -890.36 kJ/mol - ∆H°formation of H2O (l) = -285.8 kJ/mol - ∆H°formation of CO2 (g) = -393.5 kJ/mol

asked Feb 3 in ThermoChemistry

0 votes

1 answer 48 views

Calculate the standard enthalpy change for the following reaction:2Fe(s) + 3/2O2(g) → Fe2O3(s)Given that the standard enthalpy of formation of Fe2O3(s) is -824 kJ/mol and the standard enthalpy of formation of Fe(s) and O2(g) are 0 kJ/mol.

asked Feb 3 in Chemical thermodynamics

0 votes

1 answer 77 views

How does aspirin (acetylsalicylic acid) inhibit the formation of prostaglandins and thromboxanes, and what specific interactions occur between aspirin and the enzymes involved in these processes?

asked Jan 31 in Medicinal Chemistry

0 votes

1 answer 99 views

How does the binding affinity between a protein and its ligand change with varying pH levels? Use molecular dynamics simulations to analyze the interaction and observe any structural changes.

asked Jan 31 in Computational Chemistry

0 votes

1 answer 55 views

How can the concentration of lead in a water sample be determined using atomic absorption spectroscopy?

asked Jan 29 in Analytical Chemistry

0 votes

1 answer 72 views

A student needs to calculate the Tafel slopes for the anodic and cathodic reactions from a given set of experimental data obtained during an electrochemical experiment. The experiment involves the corrosion of iron in a solution with a pH of 3.5. The anodic and cathodic current densities were measured at various applied potentials ranging from -700 mV vs SHE to -400 mV vs SHE. The student needs to plot a Tafel plot for each reaction and calculate their corresponding Tafel slopes. Based on the obtained results, the student needs to explain the corrosion mechanism of iron in the given acidic solution.

asked Jan 22 in ElectroChemistry

0 votes

1 answer 52 views

A chemistry student wants to determine the surface area of a metal oxide sample using the Langmuir adsorption isotherm. The student collects adsorption data at different pressures and determines the amount of gas adsorbed on the surface. The Langmuir isotherm equation used is y = Kx / (1 + Kx), where y is the fractional surface coverage, x is the pressure of the gas, and K is a constant related to the adsorption energy. The student obtains the following data:Pressure (atm) | Fractional surface coverage-------------|---------------------------

asked Jan 22 in Surface Chemistry

0 votes

1 answer 63 views

A chemistry student needs to determine the rate law for the reaction between hydrogen peroxide and iodide ion in the presence of an acid catalyst. Using experimental data, what is the order of the reaction with respect to hydrogen peroxide, iodide ion, and acid? Write the rate law equation for this reaction.

asked Jan 22 in Chemical kinetics

0 votes

1 answer 36 views

How are character strengths incorporated into positive psychology principles?

asked Jan 17 in Psychology

0 votes

1 answer 33 views

How does biopsychology explain consciousness?

asked Jan 17 in Psychology

Categories