Recent activity by Dawn49061396

1 answer 26 views

What is the mechanism of the reaction between 2-methylpropene and hydrobromic acid in the presence of peroxide? What are the intermediates formed during the reaction and how do they contribute to the overall reaction mechanism?

asked 3 days ago in Organic Chemistry

1 answer 18 views

How does the presence of one drug affect the metabolism of another drug in the human body, and what are the potential consequences of drug-drug interactions on the efficacy and safety of medicinal treatments?

asked 3 days ago in Medicinal Chemistry

1 answer 29 views

How does the photochemical property of a dye or pigment affect its ability to bleach or fade when exposed to sunlight? Use specific examples to explain the underlying photochemical reactions involved.

answered 3 days ago in PhotoChemistry

1 answer 14 views

What is the effect of excitation wavelength on the fluorescence emission spectrum of a specific fluorescent dye?

answered 5 days ago in PhotoChemistry

1 answer 21 views

What is the effect of varying reactant concentrations on the reaction yield?

answered 5 days ago in Chemical kinetics

1 answer 11 views

What is the critical temperature of nitrogen and why is it important in industrial applications?

asked 6 days ago in Physical Chemistry

1 answer 24 views

What is the best method for synthesizing high molecular weight polyvinylpyrrolidone from vinylpyrrolidone monomer?

asked Feb 17 in Chemical synthesis

1 answer 29 views

How does the addition of different elements affect the mechanical properties (such as strength, ductility, and toughness) of metal alloys used in aerospace applications?

answered Feb 17 in Materials Chemistry

1 answer 30 views

How does the surface modification of biomaterials using plasma treatment affect the wettability and biocompatibility of the materials?

asked Feb 17 in Surface Chemistry

1 answer 38 views

How do different types of sunscreen agents (e.g. organic vs. inorganic) differ in their photochemical properties, and how do these properties affect their effectiveness at protecting against UV radiation?

answered Feb 14 in PhotoChemistry

1 answer 32 views

What factors contribute to the stability of inorganic compounds and how do these factors affect the compound's structure and reactivity?

asked Feb 14 in Inorganic Chemistry

1 answer 7 views

What factors affect the adhesion strength of a coating on a metal surface?

answered Feb 14 in Surface Chemistry

1 answer 30 views

What is the impact of different types of microplastics (e.g. polyethylene, polypropylene, nylon) on the growth and development of marine organisms such as phytoplankton and zooplankton?

answered Feb 13 in Environmental Chemistry

1 answer 45 views

What is the magnetic susceptibility of a benzene molecule and how does it change upon the addition of a nickel atom to the molecule? Calculate the values using quantum chemistry calculations and explain the observed changes in magnetic properties.

asked Feb 13 in Quantum Chemistry

1 answer 38 views

How do intermolecular interactions and solvation effects affect the stability of drug molecules in aqueous solutions?

asked Feb 13 in Quantum Chemistry

1 answer 8 views

How do the photochemical properties of enantiomers differ and what are the implications of these differences in chemistry and in everyday life?

asked Feb 13 in PhotoChemistry

1 answer 50 views

What is the density functional theory calculation prediction for the electronic transport properties (conductance and current-voltage curves) of a graphene nanoribbon with zigzag edges, and how does it compare to experimental measurements?

asked Feb 12 in Computational Chemistry

1 answer 37 views

How can the molecular weight and branching of polymers affect the drug release rate in polymer-based drug delivery systems?

asked Feb 10 in Polymer Chemistry

1 answer 41 views

How can magnetic resonance spectroscopy be used to determine the purity of a chemical compound? Develop a protocol for using NMR spectroscopy to assess the purity of a sample of 2-butanone.

answered Feb 5 in Physical Chemistry

1 answer 10 views

Here's a precise problem for a chemistry student to solve related to designing a heat exchanger for a specific process:A chemical plant produces a product with a flow rate of 500 liters per hour, and it needs to be cooled from its initial temperature of 120°C to its final temperature of 80°C before it can be packaged for shipment. The cooling medium that will be used is water, which is available at a flow rate of 400 liters per hour and an initial temperature of 20°C. Design a heat exchanger to cool the product and determine the required surface area of the heat exchanger if the overall heat transfer coefficient is 500 W/m2K.

answered Feb 4 in Chemical engineering

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