Recent activity by KatherinaI21

1 answer 72 views

How does the route of administration affect the pharmacokinetics of a drug in the body? Compare and contrast the pharmacokinetics of a drug administered orally versus intravenously.

asked Feb 24 in Medicinal Chemistry

1 answer 76 views

The question for the chemistry student to solve is: How does pH affect the stability and coagulation of a colloidal solution?

asked Feb 22 in Surface Chemistry

1 answer 70 views

How does the pH of a solution affect the rate of a specific photochemical reaction?

asked Feb 22 in PhotoChemistry

1 answer 99 views

How does the concentration and exposure duration of lead, cadmium, and mercury affect the toxicity and bioaccumulation of these heavy metals in aquatic organisms such as fish and shellfish?

answered Feb 18 in Environmental Chemistry

1 answer 79 views

What is the chemical process behind the formation of acid rain, and what are the environmental effects of acid rain on aquatic life and terrestrial ecosystems?

answered Feb 18 in Environmental Chemistry

1 answer 93 views

What is the chemical equation for the combustion of methane (CH₄) in the presence of oxygen (O₂)? And what are the products formed during this combustion reaction?

asked Feb 18 in Chemical reactions

1 answer 77 views

How can the use of adsorption be optimized in designing a system for the treatment of industrial wastewater containing heavy metals?

asked Feb 14 in Chemical engineering

1 answer 127 views

What is the bond angle in a molecule of carbon dioxide (CO2)?

asked Feb 13 in Chemical bonding

1 answer 193 views

What is the role of DNA polymerase III in the replication of DNA, and how does it proofread the newly synthesized DNA strand for accuracy? Provide a detailed explanation of the mechanism involved.

answered Feb 12 in BioChemistry

1 answer 110 views

How can we design new molecules that specifically target and inhibit the COX-2 enzyme to effectively treat inflammatory diseases without causing unwanted side effects?

asked Feb 12 in Medicinal Chemistry

1 answer 77 views

How can we design a system for the production of natural vanilla flavor using chemical engineering principles and techniques?

asked Feb 12 in Chemical engineering

1 answer 81 views

How can the irreversible process of mixing two gases at different temperatures be described using non-equilibrium thermodynamics? Provide a quantitative analysis of the process assuming ideal gas behavior, and explain the consequences of irreversible mixing.

asked Feb 7 in Physical Chemistry

1 answer 135 views

Design a distillation column to separate a mixture of ethanol and water using McCabe-Thiele Method. The feed contains 50 mol% ethanol and the distillate should have a purity of at least 95 mol% ethanol. The reflux ratio is 2.5 and the boil-up ratio is 1.5. The column must have 10 theoretical plates. Determine the number of trays above the feed and below the feed and the corresponding compositions of the distillate and bottoms.

asked Feb 4 in Chemical engineering

1 answer 123 views

Calculate the standard enthalpy change for the phase transition reaction from solid to liquid for a sample of substance X, given that the mass of the sample is 10 grams and the melting point of substance X is 50°C. The specific heat capacity of substance X is 2 J/g°C and the enthalpy of fusion for substance X is 50 J/g.

answered Feb 3 in Chemical thermodynamics

1 answer 172 views

Calculate the standard electrode potential for the cell reaction: Fe3+(aq) + e- → Fe2+(aq) Given E°Fe3+/Fe2+ = 0.77 V.

answered Feb 3 in ElectroChemistry

1 answer 137 views

What is the effect of changing the concentration of one reactant on the equilibrium constant of a reaction with a known rate?

answered Feb 3 in Chemical kinetics

1 answer 163 views

How do the photochemical properties of bioluminescent organisms differ from those of non-bioluminescent organisms?

asked Jan 31 in PhotoChemistry

1 answer 115 views

How does ATP regulate the glycolysis pathway?

answered Jan 31 in BioChemistry

1 answer 162 views

What is the effect of adding a catalyst on the equilibrium position of a redox reaction between potassium permanganate and oxalic acid if the reaction has already reached equilibrium at a specific temperature and pressure? Provide a detailed explanation and show your calculations.

answered Jan 30 in Chemical equilibrium

1 answer 131 views

What is the effect of catalyst on the activation energy and rate of a chemical reaction? Provide an example of a catalytic reaction and explain how the catalyst works to increase the rate of the reaction.

answered Jan 30 in Physical Chemistry

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