Recent activity by ZellaSeamon3

1 answer 80 views

How does the size and shape of nanoparticles affect their photochemical properties? Use specific examples and scientific evidence to support your answer.

asked Feb 24 in PhotoChemistry

1 answer 77 views

How does the size and shape of the catalyst affect the rate of a catalytic reaction?

asked Feb 24 in Physical Chemistry

1 answer 86 views

How does the rate of photochemical reactions in a solution of anthracene and a photosensitizer vary with changes in light intensity?

answered Feb 22 in PhotoChemistry

1 answer 85 views

How does light intensity affect the rate of a specific photochemical reaction involving the conversion of cis-2-butene into trans-2-butene?

asked Feb 22 in PhotoChemistry

1 answer 80 views

How does the molecular structure of a drug affect its pharmacodynamic properties and ultimately its effectiveness in treating a particular disease?

asked Feb 21 in Medicinal Chemistry

1 answer 96 views

What is the hybridization of the carbon atom in formaldehyde (H2CO)?

answered Feb 20 in Chemical bonding

1 answer 84 views

How does the energy profile of an excited state of a molecule differ from its ground state, and how can we predict the transitions between them using quantum chemical calculations?

asked Feb 20 in Computational Chemistry

1 answer 79 views

How does the concentration of the catalyst affect the reaction rate of the decomposition of hydrogen peroxide?

asked Feb 18 in Chemical kinetics

1 answer 90 views

What is the mechanism of acid-catalyzed ring-opening of epoxides?

asked Feb 17 in Organic Chemistry

1 answer 92 views

How can quantum computing help in the development of new drugs with specific properties, such as improved efficacy and reduced side effects?

answered Feb 5 in Quantum Chemistry

1 answer 88 views

How can chemistry educators increase the emphasis on safety protocols in chemistry labs and ensure that students are properly trained to prevent accidents and handle hazardous materials?

asked Feb 4 in Chemical education

1 answer 107 views

Design a strategy to protect the alcohol functional group in a molecule containing both a primary amine and a carboxylic acid group, to prevent unwanted reactions during organic synthesis.

answered Feb 4 in Organic Chemistry

1 answer 133 views

Calculate the total resistance of an electrochemical cell consisting of two half-cells where one half-cell has a copper electrode submerged in a 0.5 M CuSO4 solution, and the other half-cell has a zinc electrode submerged in a 1.0 M ZnSO4 solution. The copper electrode is connected to the zinc electrode through a salt bridge. The resistance of the salt bridge is 22 ohms, and the resistance of the copper and zinc electrodes are negligible.

answered Feb 3 in ElectroChemistry

1 answer 84 views

Calculate the standard enthalpy of formation of water if you know that the standard enthalpy of combustion of hydrogen is -286 kJ/mol and the standard enthalpy of combustion of oxygen is -394 kJ/mol.

asked Feb 3 in Chemical thermodynamics

1 answer 160 views

Calculate the standard electrode potential for the redox reaction: Fe3+(aq) + e- → Fe2+(aq) Given that the standard electrode potential for the reduction of Fe3+(aq) to Fe2+(aq) is +0.771 V and the standard electrode potential for the reduction of H+(aq) to H2(g) is 0.000 V.

asked Feb 3 in Chemical thermodynamics

1 answer 144 views

What is the effect of adding a catalyst on the equilibrium position of a redox reaction between iron and copper ions in a solution at room temperature, and how would the equilibrium constant be affected by the addition of the catalyst?

answered Jan 30 in Chemical equilibrium

1 answer 133 views

How does a change in the number of electrons affect the dipole moment of a molecule as predicted by ab initio calculations?

asked Jan 30 in Computational Chemistry

1 answer 135 views

What is the concentration of lead (Pb) in a water sample collected from a local river, and how does it compare to the maximum permissible limit set by the World Health Organization (WHO)? Determine the answer using atomic absorption spectroscopy and provide a detailed report including instrumental parameters, experimental procedure, and results.

asked Jan 30 in Analytical Chemistry

1 answer 149 views

What is the concentration of iron(II) sulfate in a sample of water taken from a lake, using spectrophotometry with a known molar absorptivity of 11,300 L/mol*cm, if the absorbance of the sample is measured to be 0.423 at a wavelength of 510 nm?

asked Jan 30 in Analytical Chemistry

1 answer 97 views

How can the composition of a mixture of caffeine and aspirin be analyzed using liquid chromatography?

asked Jan 29 in Analytical Chemistry

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