Recent activity by JonelleCouls

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How does the size and shape of graphene nanoparticles affect their electronic and optical properties? And, how can we calculate these properties using quantum chemistry principles?

asked 1 day ago in Quantum Chemistry

1 answer 17 views

How does the use of different solvents affect the rate of the chemical reaction between sodium hydroxide and hydrochloric acid, and how can these effects be explained in terms of the solvent's polarity and ability to stabilize the reaction intermediates?

answered 3 days ago in Chemical kinetics

1 answer 28 views

What is the pKa value of acetic acid and how does it affect the acidity of the solution when mixed with a strong base such as sodium hydroxide (NaOH)? Determine the pH of the resulting solution and explain the mechanism of the acid-base reaction.

asked 3 days ago in Organic Chemistry

1 answer 28 views

What is the optimal temperature and catalyst to use in the synthesis of polyethylene oxide from ethylene oxide monomer, and how do they affect the yield and properties of the resulting polymer?

answered 4 days ago in Chemical synthesis

1 answer 24 views

What is the optimal ratio of diisocyanate to polyol required for the synthesis of polyurethane with maximum tensile strength and elongation at break?

asked 4 days ago in Chemical synthesis

1 answer 28 views

What is the rate constant k for the decomposition of N2O5 (g) to NO2(g) and O2(g) at 250°C if the initial concentration of N2O5 is 0.10 M and the half-life for the reaction is 120 seconds?

answered 6 days ago in Physical Chemistry

1 answer 31 views

What is the effect of varying the ratio of polymer A to polymer B on the compatibility of a polymer blend?

asked Feb 18 in Polymer Chemistry

1 answer 33 views

How does the chemical structure of a drug affect its pharmacodynamics in the body?

answered Feb 18 in Medicinal Chemistry

1 answer 21 views

How does the calculation of molecular orbitals provide information about the electronic structure and chemical properties of a molecule, and how can this information be used to predict its reactivity in chemical reactions?

asked Feb 18 in Quantum Chemistry

1 answer 6 views

How does the binding of metal ions to specific amino acid residues in metalloenzymes and metalloproteins affect their catalytic activity and overall function?

answered Feb 17 in Coordination Chemistry

1 answer 35 views

How can the yield and purity of desired flavors be optimized in the production process by adjusting the parameters such as reaction temperature, reaction time, and reactant ratios?

answered Feb 14 in Chemical engineering

1 answer 27 views

How can the synthesis of zeolites be optimized to maximize yield and enhance their properties for specific applications, such as catalysts or adsorbents?

answered Feb 14 in Materials Chemistry

1 answer 9 views

How do molecular dynamics simulations of lipid bilayers provide insight into the behavior and function of cell membranes? Provide a detailed analysis of the simulation results and their significance in understanding lipid bilayer structure and properties.

answered Feb 13 in Computational Chemistry

1 answer 43 views

What is the pH of a solution that contains 0.1 M HCl (hydrochloric acid)? The acid dissociation constant (Ka) of HCl is 1.3 x 10^-6.

answered Feb 13 in Chemical reactions

1 answer 10 views

How can we design drugs to treat metabolic disorders in a way that minimizes unwanted side effects and maximizes therapeutic efficacy?

asked Feb 12 in Medicinal Chemistry

1 answer 7 views

How can we design drugs that effectively target a specific type of bacteria without harming the beneficial bacteria in the body?

asked Feb 12 in Medicinal Chemistry

1 answer 55 views

How can the stability of emulsions be improved and what are the factors affecting it?

answered Feb 10 in Surface Chemistry

1 answer 27 views

How can the optical properties of a polymer matrix be modified by incorporating different types and quantities of dopants into the structure?

asked Feb 10 in Polymer Chemistry

1 answer 30 views

How can the critical temperature of a superconducting material be optimized to increase its electrical conductivity and practical applications?

asked Feb 6 in Materials Chemistry

1 answer 29 views

How can magnetic resonance spectroscopy be used to determine the purity and concentration of a sample of aspirin? Provide a step-by-step explanation of the process and discuss the factors that can affect the accuracy of the results.

asked Feb 6 in Physical Chemistry

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