Recent activity by CarmaC633252

1 answer 93 views

What are the key photochemical properties that influence the sensitivity of silver halide materials used in black and white photography and how do these properties vary among different types of photosensitive materials?

answered Feb 24 in PhotoChemistry

1 answer 92 views

How does the rate of a chosen photochemical reaction change as the temperature is increased or decreased?

answered Feb 22 in PhotoChemistry

1 answer 96 views

What is the role of the metal ion in the active site of hemoglobin, and how does the coordination chemistry of the metal ion contribute to the protein's function as an oxygen carrier?

answered Feb 20 in Coordination Chemistry

1 answer 93 views

What is the efficiency of an electrochemical cell when the electrode potential is +0.6V and the cell voltage is 1.8V?

answered Feb 20 in ElectroChemistry

1 answer 96 views

What is the effect of temperature on the solubility of a solid in a liquid solvent? Provide an experimental method to determine this relationship for a given solute-solvent system.

asked Feb 20 in Physical Chemistry

1 answer 91 views

What is the activation energy for the reaction of Zn and CuSO4 in a galvanic cell with a cell potential of 1.12V, given that the rate constant at 25°C is 5.7 × 10^-5 s^-1 and the activation energy is 87.4 kJ/mol?

answered Feb 17 in ElectroChemistry

1 answer 94 views

Identify the type of colloids present and explain the particle interactions in a sample of milk.

answered Feb 13 in Physical Chemistry

1 answer 124 views

How does inadequate training of chemistry teachers affect student understanding and performance in chemistry courses?

asked Feb 13 in Chemical education

1 answer 128 views

What are the consequences of inadequate emphasis on chemical reactions and equations in high school chemistry education? Provide specific examples of how this affects a student's understanding and application of chemistry concepts.

asked Feb 13 in Chemical education

1 answer 85 views

How can we design drugs that target specific genes responsible for causing genetic disorders, such as sickle cell anemia or cystic fibrosis, while avoiding damage to healthy genes?

answered Feb 12 in Medicinal Chemistry

1 answer 88 views

How can we design an efficient system for the recovery of valuable metals such as gold, silver, and copper from electronic waste, while minimizing the amount of hazardous waste generated in the process?

asked Feb 12 in Chemical engineering

1 answer 92 views

What impact do residual levels of the commonly used insecticide Chlorpyrifos have on human health when ingested through contaminated food items?

answered Feb 12 in Environmental Chemistry

1 answer 155 views

How can the release rate of drugs from polymer-based drug delivery systems be controlled and optimized for maximum therapeutic efficacy and minimal side effects?

asked Feb 10 in Polymer Chemistry

1 answer 191 views

How can the properties of polymer-based sensors be optimized to detect specific molecules in environmental monitoring applications?

asked Feb 10 in Polymer Chemistry

1 answer 163 views

Calculate the standard enthalpy change (∆H°) for the formation of ammonia (NH3) at 298 K using the following data: N2(g) + 3H2(g) → 2NH3(g) ∆H° = −92.4 kJ/mol Hint: Standard enthalpy change (∆H°) for a reaction is calculated by taking the sum of the standard enthalpies of the products minus the sum of the standard enthalpies of the reactants.

answered Feb 3 in Chemical thermodynamics

1 answer 135 views

What is the effect of changing the concentration of reactants on the reaction rate and sustainability of a chemical reaction?

asked Feb 3 in Chemical kinetics

1 answer 202 views

How many moles of copper (Cu) are present in a sample that requires 4000 coulombs of electricity to be completely oxidized in a coulometric analysis?

answered Jan 30 in Analytical Chemistry

1 answer 78 views

How can we analyze the composition of a given sample using high-performance liquid chromatography (HPLC) and obtain accurate data for the identification and quantification of its components?

asked Jan 29 in Analytical Chemistry

1 answer 96 views

Calculate the enthalpy change for the following reaction using Hess's Law: 2SO3(g) → 2SO2(g) + O2(g)Given the following enthalpy changes:2SO3(g) + ΔH1 → 2SO2(g) + O2(g); ΔH1 = 198.2 kJ/molSO2(g) + 1/2O2(g) + ΔH2 → SO3(g); ΔH2 = -98.9 kJ/mol

asked Jan 23 in Chemical reactions

1 answer 112 views

Calculate the enthalpy change for the dissolution of 5 grams of sodium chloride in 50 mL of water if the temperature of the solution decreases from 25 °C to 21 °C. The density of the solution is 1.0 g/mL and the specific heat capacity of the solution is 4.18 J/g°C. (Assume the heat exchange between the solution and the surroundings is negligible)

asked Jan 23 in ThermoChemistry

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