Recent activity by SteveAdamson

1 answer 29 views

How Do Different Polymer Structures Affect the Rheological Properties of Polymer Melts at Varying Temperatures?

1 answer 26 views

How does the presence of a catalyst affect the rate of a photophysical process such as the degradation of a dye molecule under UV radiation?

answered Feb 22 in Physical Chemistry

1 answer 39 views

What is the mechanism for the production of bioluminescence in organisms such as fireflies and how do their photochemical properties differ from other organisms that produce light?

asked Feb 20 in PhotoChemistry

1 answer 31 views

How does the length of a carbon nanotube affect its electronic transport properties, as calculated using density functional theory?

answered Feb 20 in Computational Chemistry

1 answer 27 views

What is the effect of increasing temperature on the formation of a complex ion in a chemical equilibrium reaction? Use a balanced chemical equation and appropriate equilibrium constants to support your answer.

answered Feb 19 in Chemical equilibrium

1 answer 46 views

How does the change in reactant orientation affect the rate of the chemical reaction between magnesium and hydrochloric acid, and how can this be investigated?

answered Feb 18 in Chemical kinetics

1 answer 29 views

How does the adsorption energy of a nitrogen molecule on the surface of a metal catalyst change with the addition of a small amount of a second metal dopant, as predicted by density functional theory calculations?

answered Feb 17 in Computational Chemistry

1 answer 38 views

What are the mechanisms of protein-protein interactions and how do they influence the formation of protein complexes? Provide specific examples of protein-protein interactions and explain the significance of these interactions in biological processes.

asked Feb 14 in BioChemistry

1 answer 32 views

How can the yield of a chemical reaction be optimized by manipulating the reaction conditions, such as temperature or pressure, and what are the possible impacts of such optimization on the production process and final product quality?

asked Feb 14 in Chemical engineering

1 answer 36 views

What is the difference between corrosion and passivation in surface chemistry and what are the factors that contribute to the corrosion and passivation of metals? Provide specific examples to illustrate your answer.

answered Feb 12 in Surface Chemistry

1 answer 57 views

How do chemical modifications to histone proteins affect DNA replication and repair processes in eukaryotic cells?

answered Feb 12 in BioChemistry

1 answer 55 views

How can the coordination chemistry of metallophthalocyanines affect their ability to act as efficient catalysts for reactions such as oxidation of organic compounds or reduction of water to produce hydrogen gas?

asked Feb 6 in Coordination Chemistry

1 answer 63 views

Design a retrosynthesis for the synthesis of the following compound: 2-ethyl-3-methylcyclopent-2-enone using the Grignard reaction as the key step. Show all the necessary reagents and reaction conditions.

asked Feb 4 in Organic Chemistry

1 answer 59 views

How do chaperone proteins facilitate proper folding of newly synthesized polypeptide chains during protein synthesis? Include the role of ATP in the folding process in your answer.

asked Feb 3 in BioChemistry

1 answer 111 views

What is the dipole moment of carbon dioxide (CO2)?

answered Jan 31 in Chemical bonding

1 answer 93 views

What steps can be taken to address the issue of inadequate emphasis on chemical reactions and equations in the chemistry curriculum, and what impact would these steps have on student learning outcomes and retention rates?

answered Jan 30 in Chemical education

1 answer 85 views

Calculate the enthalpy change of desorption of water from a graphite surface if the initial pressure of water is 10 torr and the final pressure is 1 torr at a constant temperature of 300 K. The surface area of the graphite is 50 cm² and the heat of adsorption of water on the surface is -40 kJ/mol.

asked Jan 23 in ThermoChemistry

1 answer 76 views

Calculate the bond length between two hydrogen atoms that are covalently bonded together. Given: the electronegativity value of hydrogen is 2.1 and the bond energy is 436 kJ/mol. Hint: Use the formula =0.74(∘+∘) where ∘ is the covalent radius of hydrogen.

answered Jan 23 in Chemical bonding

1 answer 91 views

A student performed an experiment to synthesize aspirin using 5 grams of salicylic acid and an excess of acetic anhydride. After the reaction was completed, the student collected 4.2 grams of aspirin. What is the percent yield of this experiment?

asked Jan 22 in Chemical reactions

1 answer 109 views

A chemistry experiment involves burning a sample of propane gas, C3H8, and measuring the heat released. If 2.00 grams of propane is burned completely to produce CO2(g) and H2O(l), and the heat of combustion is found to be -2044 kJ/mol, what is the heat released in kJ when 2.00 grams of propane is burned?

asked Jan 22 in ThermoChemistry

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