Recent activity by HermelindaYm

1 answer 23 views

How does the rate of the photochemical reaction change with increasing temperature? Provide a detailed explanation with experimental evidence and a graphical representation of the results.

asked Feb 22 in PhotoChemistry

1 answer 37 views

How does the pH of a solution affect the rate of a photochemical reaction and what is the optimal pH range for maximizing the yield of the product in this specific reaction?

answered Feb 22 in PhotoChemistry

1 answer 28 views

What is the order of reaction with respect to reactant A if the rate of reaction doubles when the concentration of A is doubled, while the concentration of reactant B remains constant?

asked Feb 22 in Chemical kinetics

1 answer 31 views

What is the most efficient method for synthesizing silver nanoparticles with a uniform size distribution, and how can this method be optimized to produce maximum yield?

answered Feb 21 in Materials Chemistry

1 answer 34 views

What is the hybridization of the carbon atoms in the molecule C2H4 (ethene)?

asked Feb 20 in Chemical bonding

1 answer 27 views

What is the efficient method for preparing 2,4-dinitrophenylhydrazine from hydrazine and 2,4-dinitrochlorobenzene, and what is the yield of the reaction?

asked Feb 20 in Chemical synthesis

1 answer 34 views

What is the effect of metal complexation on the photochemical properties of a dye molecule? Provide examples of metal-dye complexation and compare their photochemical behavior with the respective uncomplexed dyes.

asked Feb 19 in PhotoChemistry

1 answer 39 views

What is the specific DNA sequence recognized by the transcription factor Oct4 and how does this interaction affect gene expression in embryonic stem cells?

answered Feb 14 in BioChemistry

1 answer 60 views

What is the mechanism by which chlorofluorocarbons (CFCs) deplete the ozone layer? How does their chemical structure contribute to this process?

asked Feb 12 in Environmental Chemistry

1 answer 64 views

How can the structure of molecules be optimized to enhance the effectiveness of new treatments for respiratory diseases targeting specific neurotransmitter receptors in the lungs?

asked Feb 11 in Medicinal Chemistry

1 answer 80 views

How can the sensitivity and selectivity of polymer-based sensors be optimized for detecting specific molecules?

answered Feb 10 in Polymer Chemistry

1 answer 59 views

How can the production of fragrances be optimized to ensure maximum efficiency, minimal waste, and consistent quality? What are the key steps and parameters that need to be considered in the development of a sustainable and effective fragrance production process, and how can these be optimized through chemistry and chemical engineering principles?

asked Feb 10 in Chemical engineering

1 answer 34 views

How can the efficiency of the system for the production of cosmetics be improved by optimizing the chemical reactions and selecting appropriate raw materials?

asked Feb 7 in Chemical engineering

1 answer 40 views

How can the drug delivery system be optimized to improve the efficacy of a specific medication for the treatment of breast cancer?

asked Feb 7 in Medicinal Chemistry

1 answer 46 views

How can the design of a storage and transportation system for hazardous chemicals be optimized for safety and efficiency, while minimizing the risks of leakage, spillage, and environmental contamination?

answered Feb 7 in Chemical engineering

1 answer 49 views

How can the compatibility between two polymers be improved when creating a polymer blend for a specific application, and what are the key factors in determining their compatibility?

asked Feb 6 in Polymer Chemistry

1 answer 100 views

Design a distillation column to separate a mixture of ethanol and water. The feed stream contains 20 mol% ethanol and the desired distillate should contain at least 95 mol% ethanol. The reflux ratio should be 3:1 and the column should have 25 theoretical trays. Determine the composition of the distillate, bottoms, and the optimal feed tray location to achieve the desired separation. Use McCabe-Thiele method to determine the number of theoretical trays required.

asked Feb 4 in Chemical engineering

1 answer 123 views

What is the difference between an amino acid and a nucleotide, and how does their chemical structure affect their function within a biological system?

answered Jan 31 in Organic Chemistry

1 answer 107 views

What is the effect of adding different weight percentages of graphene nanoparticles on the mechanical properties of polypropylene Polymer nanocomposites?

answered Jan 30 in Polymer Chemistry

1 answer 45 views

Calculate the corrosion current density for a steel pipe of diameter 10 cm and length 20 m, which is exposed to a 0.1 M HCl solution. The corrosion potential of steel in the given environment is -0.5 V (SHE), the Tafel slope is 0.12 V/decade, and the temperature is 25°C. Consider the density of steel to be 7.86 g/cm³ and the flow rate of the solution to be 5 L/min.

answered Jan 23 in ElectroChemistry

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