Recent activity by Latonya89F54

1 answer 27 views

What is the mechanism for the preparation of 4-bromoacetanilide from acetanilide and bromine, and how does the mechanism differ from the preparation of aniline from nitrobenzene?

answered Feb 22 in Chemical synthesis

1 answer 21 views

What is the stepwise chemical reaction mechanism involved in the preparation of 2,4,6-trinitrotoluene from toluene and nitric acid, and what are the conditions required for each step?

asked Feb 22 in Chemical synthesis

1 answer 30 views

How does the photochemical properties of the active layer in photovoltaic cells affect the efficiency of the cell's conversion of sunlight to electrical energy?

answered Feb 22 in PhotoChemistry

1 answer 29 views

How does the photochemical property of phosphorescent materials affect their efficiency in converting light energy to chemical energy?

answered Feb 22 in PhotoChemistry

1 answer 25 views

What is the effect of increasing solvent polarity on the rate of the photochemical reaction of benzophenone in different solvents, such as ethanol, water, and acetone?

asked Feb 19 in PhotoChemistry

1 answer 27 views

What is the coordination number and structure for the complex [UO2(C2O4)(H2O)2]2-? How does the size of the ligands affect the coordination number and structure of the complex for lanthanide and actinide ions?

answered Feb 19 in Coordination Chemistry

1 answer 37 views

How does the coordination chemistry of lanthanide and actinide complexes differ from that of other transition metals?

asked Feb 19 in Coordination Chemistry

1 answer 113 views

What factors affect the rate of ligand substitution reactions in coordination chemistry? How do these factors influence the reaction mechanism and the overall outcome of the reaction? Provide a detailed explanation with specific examples.

answered Feb 13 in Coordination Chemistry

1 answer 90 views

What is the rate constant for the conversion of cyclopropane to propene if it follows first-order kinetics and has a rate of 4.67 x 10^-4 s^-1 at 25°C?

answered Feb 13 in Chemical kinetics

1 answer 61 views

What is the effect of chirality on the photochemical properties of molecules and how does it impact the formation of enantiomers? Provide a detailed explanation with relevant examples.

asked Feb 12 in PhotoChemistry

1 answer 39 views

How can the adhesion properties of a polymer be improved to enhance its bonding to specific surfaces, such as metals or glass, for industrial applications?

answered Feb 6 in Polymer Chemistry

1 answer 40 views

Calculate the standard enthalpy change for the sublimation of iodine (I2) if 1 mole of I2(s) is converted to 1 mole of I2(g) at 25°C and 1 bar pressure. Given the following information:- The standard enthalpy of fusion of I2 is 15.4 kJ/mol- The standard enthalpy of vaporization of I2 is 41.3 kJ/mol- The standard entropy change for the sublimation of I2 is 62.4 J/mol K.

asked Feb 3 in Chemical thermodynamics

1 answer 91 views

Calculate the standard enthalpy change for the following reaction: 2H2(g) + O2(g) → 2H2O(l)Given the standard enthalpies of formation for H2O (l), H2 (g) and O2 (g) are -285.8 kJ/mol, 0 kJ/mol and 0 kJ/mol, respectively.

asked Feb 3 in Chemical thermodynamics

1 answer 101 views

What is the role of ATP synthase in the oxidative phosphorylation process of the citric acid cycle? How does it contribute to the production of ATP molecules in the cell?

asked Jan 31 in BioChemistry

1 answer 86 views

Calculate the number of electrons transferred when a solution containing 0.50 mol of HCl reacts with 0.50 mol of NaOH in a redox reaction.

answered Jan 30 in ElectroChemistry

1 answer 82 views

Calculate the enthalpy of vaporization of water given the following information: - The boiling point of water is 100°C- The specific heat capacity of liquid water is 4.18 J/g·°C- The specific heat capacity of steam is 1.84 J/g·°C- The heat of fusion of water is 40.7 kJ/mol - The molar mass of water is 18.015 g/mol- The heat capacity of the container is negligible- Assume that the vaporized water behaves ideally and has a constant heat capacity

asked Jan 23 in ThermoChemistry

1 answer 72 views

Calculate the enthalpy of adsorption of benzene vapor on silica gel at 25°C and a pressure of 2.0 atm, given that the mass of adsorbent used is 0.25 g and the adsorption capacity of silica gel for benzene at this temperature and pressure is 0.75 g/g.

asked Jan 23 in ThermoChemistry

1 answer 79 views

Calculate the enthalpy change (ΔH) for the dissolution of 10 grams of NaOH in 100 mL of water, given that the final temperature after mixing is 28°C and the initial temperature of water was 25°C. The specific heat capacity of water is 4.18 J/g°C. The molar mass of NaOH is 40.00 g/mol and the enthalpy of dissolution for NaOH is -44.51 kJ/mol.

answered Jan 23 in ThermoChemistry

1 answer 52 views

Calculate the corrosion potential of a silver metal in a solution containing 0.1 M silver nitrate and 1 M nitric acid given that the standard reduction potential of the Ag⁺/Ag couple is +0.80 V and the standard reduction potential of the NO₃⁻/NO₂⁻ couple is +0.96 V.

asked Jan 23 in ElectroChemistry

1 answer 72 views

Calculate the area per molecule occupied by a monolayer of n-octadecane molecules adsorbed at the air-water interface assuming a surface pressure of 20 mN/m. The molecular weight of n-octadecane is 284.54 g/mol and its molecular area in the liquid phase is 0.219 nm². Use the Langmuir adsorption isotherm equation to solve the problem.

answered Jan 23 in Surface Chemistry

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