Recent activity by Marlene31P52

1 answer 33 views

What is the reaction quotient (Q) for the following chemical reaction at 25°C, if the initial concentrations of A, B, and C are 0.2 M, 1.0 M, and 0.5 M, respectively?2A + 3B ↔ 4C

answered Feb 22 in Chemical thermodynamics

1 answer 24 views

What is the effect of different wavelengths of light on the reaction rate between potassium permanganate and oxalic acid?

answered Feb 22 in Chemical kinetics

1 answer 36 views

What is the relationship between the primary structure of a protein and its function? Provide an example of a specific protein and explain how its primary structure contributes to its function in the body.

answered Feb 22 in BioChemistry

1 answer 25 views

What is the step-wise mechanism for the preparation of 2-chloro-4-nitroaniline from aniline and chlorine gas via the intermediate formation of 2,4-dichloronitrobenzene? Include the structures of all intermediate and final products.

asked Feb 22 in Chemical synthesis

1 answer 40 views

How do the photochemical properties of photochromic materials change with exposure to different wavelengths of light?

asked Feb 22 in PhotoChemistry

1 answer 24 views

What is the major product formed when toluene reacts with Br2 in the presence of FeBr3 catalyst? Explain the reaction mechanism involved.

answered Feb 20 in Organic Chemistry

1 answer 29 views

How does the intensity of light affect the reaction rate of the chemical reaction between potassium permanganate and oxalic acid in acidic medium?

answered Feb 20 in Chemical kinetics

1 answer 31 views

What is the impact of carbon dioxide emissions from fossil fuels on global warming and what are the potential solutions to reduce these emissions?

asked Feb 20 in Environmental Chemistry

1 answer 27 views

What is the electronegativity difference between a carbon atom (electronegativity value of 2.55) and an oxygen atom (electronegativity value of 3.44)?

answered Feb 20 in Chemical bonding

1 answer 31 views

How does the crystallinity of polymers affect their mechanical properties?

answered Feb 19 in Polymer Chemistry

1 answer 39 views

What are the best ways to overcome the limitations of hands-on experimentation in chemistry education for students, and how can virtual or simulated experiments be effectively integrated into the learning process to enhance understanding?

answered Feb 14 in Chemical education

1 answer 67 views

What is the isomerism of a molecule and how can you determine it in organic chemistry? Provide an example of two isomers and explain the key differences between them.

answered Feb 13 in Chemical bonding

1 answer 78 views

How do different types of DNA-protein interactions affect the stability and flexibility of the DNA molecule, as observed through molecular dynamics simulations?

asked Feb 12 in Computational Chemistry

1 answer 36 views

How can molecular docking studies be utilized to identify potential inhibitors of the protein-protein interaction between two specific proteins involved in a disease state?

answered Feb 5 in Computational Chemistry

1 answer 102 views

Calculate the standard enthalpy change for the reduction of iron (III) oxide using carbon monoxide as the reducing agent, given that the standard enthalpy of formation for iron (III) oxide is -824.2 kJ/mol and the standard enthalpy of formation for carbon monoxide is -110.5 kJ/mol.

answered Feb 3 in ThermoChemistry

1 answer 124 views

How do carbohydrate-protein interactions play a role in the recognition process of glycoproteins? Provide specific examples of glycoproteins and their associated carbohydrate structures, and explain how these interactions contribute to the protein's function in the cell.

answered Jan 31 in BioChemistry

1 answer 73 views

Calculate the enthalpy of ionization of magnesium using the following data: the first ionization energy of Mg is 738 kJ/mol and the lattice energy of MgCl₂ is -2495 kJ/mol.

asked Jan 23 in ThermoChemistry

1 answer 82 views

Calculate the enthalpy change of the dissolution of 5 grams of sodium hydroxide (NaOH) in 100 mL of water, given the molar enthalpy of dissolution of NaOH to be -44 kilojoules per mole.

answered Jan 23 in ThermoChemistry

1 answer 62 views

Calculate the enthalpy change for the hydrolysis of 50 grams of sucrose (C12H22O11) when dissolved in 500 ml of water at 25°C. The molar mass of sucrose is 342.3 g/mol and the enthalpy change per mole of sucrose is -564.8 kJ/mol.

asked Jan 23 in ThermoChemistry

1 answer 74 views

Assuming the volume of a container at equilibrium is 2 L, what is the new equilibrium concentration of NOCl if the volume is changed to 1 L, given that the initial concentration of NOCl is 0.10 M and the equilibrium constant (Kc) is 0.054?

asked Jan 22 in Chemical equilibrium

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