Recent activity by AugustusQsj

1 answer 24 views

What is the optimum reaction time and temperature for the synthesis of polyethylene oxide from ethylene oxide monomer, and how does altering these parameters affect the molecular weight and properties of the resulting polymer?

answered 3 days ago in Chemical synthesis

1 answer 25 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

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

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

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

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

1 answer 23 views

What is the mechanism of photodegradation of a certain organic compound (e.g. benzene)? Provide a detailed explanation of the photophysical processes involved and the products formed as a result of the degradation.

answered Feb 14 in Physical Chemistry

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?

answered Feb 14 in Environmental Chemistry

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

1 answer 27 views

How can the use of microwave-assisted synthesis methods be optimized for the production of high-quality carbon nanotubes with controlled structural properties?

answered Feb 14 in Materials Chemistry

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

1 answer 56 views

How does changing the pH affect the equilibrium position of a redox reaction between iron (II) and dichromate ions in acidic and basic solutions? Provide a balanced chemical equation and explain your reasoning using Le Chatelier's principle.

answered Feb 13 in Chemical equilibrium

1 answer 39 views

What is the effect of different types of chemical bonds (ionic, covalent, and metallic) on the physical and chemical properties of compounds? Provide specific examples of compounds to support your answer.

answered Feb 12 in Chemical education

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

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

1 answer 31 views

How can the chemistry curriculum be modified to better support students with learning disabilities in understanding and applying fundamental concepts such as stoichiometry and balancing chemical equations?

answered Feb 6 in Chemical education

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

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

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

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

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