Recent activity by SharonMendis

1 answer 25 views

How does the size and shape of nanomaterials affect their catalytic activity for a specific reaction?

1 answer 31 views

What is the mechanism for the reaction between ethene and hydrogen bromide, and what is the nature of the intermediate(s) involved in this reaction?

answered Feb 22 in Organic Chemistry

1 answer 25 views

What are the optimal laboratory conditions (temperature, pressure, solvent, reaction time) for the synthesis of polyvinylpyrrolidone from vinylpyrrolidone monomer to obtain the highest yield?

answered Feb 21 in Chemical synthesis

1 answer 26 views

How does the metabolic state of cancer cells differ from that of normal cells, and how can metabolomics and systems biology be used to develop targeted therapies for cancer treatment?

answered Feb 20 in BioChemistry

1 answer 33 views

How does the concentration of reaction products affect the rate of the chemical reaction between X and Y?

asked Feb 19 in Chemical kinetics

1 answer 37 views

What is the boiling point of sodium chloride (NaCl) at a pressure of 1 atm? Show the calculation using the Clausius-Clapeyron equation.

answered Feb 18 in Inorganic Chemistry

1 answer 33 views

What is the balanced chemical equation for the double replacement reaction between barium chloride (BaCl2) and potassium sulfate (K2SO4)?

asked Feb 17 in Chemical reactions

1 answer 29 views

How does the surface modification of biomaterials affect their biocompatibility and performance in medical applications?

asked Feb 17 in Surface Chemistry

1 answer 58 views

How can we design a new drug that selectively targets the underlying cause of psoriasis, a chronic autoimmune skin disease that affects millions of people worldwide, while minimizing potential side effects on other organs and tissues?

answered Feb 12 in Medicinal Chemistry

1 answer 42 views

What coordination chemistry principles are involved in the chelation therapy approach to remove heavy metals from the body? And how do these principles contribute to the effectiveness of chelating agents in this process?

answered Feb 12 in Coordination Chemistry

1 answer 60 views

How can the properties of polymer-based electronic materials be tailored to improve their performance in organic solar cells?

asked Feb 10 in Polymer Chemistry

1 answer 38 views

How can computational chemistry tools be used to identify novel inhibitors for specific protein-protein interactions involved in a certain disease pathway? Specifically, using molecular docking studies, can the interactions between the two proteins be analyzed and potential small molecule inhibitors be identified and characterized for their efficacy and specificity?

asked Feb 5 in Computational Chemistry

1 answer 34 views

How can chemistry students increase their exposure to current research in the field, and what resources are available to them?

answered Feb 5 in Chemical education

1 answer 37 views

How can chemistry educators encourage and promote diversity in the chemistry field to ensure that scientists from all backgrounds have the opportunity to contribute their unique perspectives and research ideas?

answered Feb 4 in Chemical education

1 answer 49 views

Calculate the standard enthalpy change for the reaction in which 6 moles of calcium oxide reacts with 3 moles of carbon dioxide to produce 2 moles of calcium carbonate. The equation for the reaction is:CaO(s) + CO2(g) → CaCO3(s)Given the standard enthalpy of formation values: ΔHf°[CaO(s)] = -635.09 kJ/mol, ΔHf°[CO2(g)] = -393.51 kJ/mol, and ΔHf°[CaCO3(s)] = -1207.44 kJ/mol.

asked Feb 3 in Chemical thermodynamics

1 answer 43 views

Calculate the standard enthalpy change for the phase transition reaction of solid carbon dioxide (dry ice) at -78.5°C to gaseous carbon dioxide at 1 atm and 25°C given that the enthalpy of formation of solid carbon dioxide and gaseous carbon dioxide are -393.5 kJ/mol and -393.5 kJ/mol, respectively.

answered Feb 3 in Chemical thermodynamics

1 answer 87 views

How does changing the concentration of a reactant affect the rate and profitability of a chemical reaction?

answered Jan 31 in Chemical kinetics

1 answer 78 views

How can the concentration of iron in a given sample be determined using spectrophotometry?

answered Jan 29 in Analytical Chemistry

1 answer 66 views

Calculate the Gibbs free energy change for the following reaction at 298 K:2CH4(g) + 3O2(g) → 2CO2(g) + 2H2O(g)Given the standard Gibbs free energy of formation at 298 K for CH4(g), O2(g), CO2(g) and H2O(g) are -50.8 kJ/mol, 0 kJ/mol, -394.4 kJ/mol, and -241.8 kJ/mol respectively.

answered Jan 23 in Chemical thermodynamics

1 answer 39 views

A chemistry student wants to investigate the activation energy for a reaction between hydrogen and chlorine gases. The student measures the initial and final temperatures of the reaction mixture, and the rate of gas evolution. Based on this information, the student wants to calculate the activation energy of the reaction using the Arrhenius equation. What steps should the student follow to determine the activation energy of the reaction?

asked Jan 22 in Chemical reactions

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