Recent activity by Precious09K0

1 answer 30 views

How do the rheological properties of polymer melts vary with changes in temperature and molecular weight?

1 answer 31 views

What is the effect of increasing the temperature on the equilibrium constant of the reaction between hydrogen gas and iodine gas to form hydrogen iodide gas, and how does this relate to the reaction rate?

answered Feb 22 in Chemical kinetics

1 answer 37 views

How does the presence of entanglement affect the electronic and magnetic properties of a molecule at the nanoscale level, and how can this be utilized in the design of more efficient molecular devices?

asked Feb 22 in Quantum Chemistry

1 answer 29 views

How does the number of layers of graphene affect its conductivity and other electronic properties, and what is the ideal number of layers for its use in electronic devices?

asked Feb 21 in Materials Chemistry

1 answer 31 views

What are the photochemical properties of the most commonly used photovoltaic materials and how do these properties affect the efficiency of the solar cells they are used in?

answered Feb 21 in PhotoChemistry

1 answer 30 views

How does the liver metabolism affect the pharmacokinetics of a drug being administered for the treatment of a particular disease?

asked Feb 20 in Medicinal Chemistry

1 answer 27 views

What is the effect of the excitation wavelength on the fluorescence emission of a specific molecule or material?

answered Feb 20 in Quantum Chemistry

1 answer 26 views

How does the crystallization rate and morphology of a polymer change with changes in processing conditions such as cooling rate, pressure, and concentration of the polymer solution?

answered Feb 19 in Polymer Chemistry

1 answer 29 views

How does the choice of exchange-correlation functional impact the accuracy of Density Functional Theory (DFT) calculations for the catalytic hydrodeoxygenation reaction of phenol on ruthenium catalysts?

asked Feb 18 in Computational Chemistry

1 answer 36 views

What is the effect of quantum coherence and entanglement on the efficiency and selectivity of chemical reactions in molecular and nanoscale systems?

asked Feb 14 in Quantum Chemistry

1 answer 63 views

What is the role of metal ions in the catalytic activities of metalloenzymes and metalloproteins? Provide at least two examples of metalloenzymes and metalloproteins and explain their functions in terms of their coordination chemistry.

asked Feb 13 in Coordination Chemistry

1 answer 37 views

How can chemistry teachers spark interest in the subject among students who perceive it as difficult and uninteresting?

answered Feb 6 in Chemical education

1 answer 78 views

Here is a precise question for the student to solve:A student performed an electroplating experiment of copper metal onto an electrode by passing a constant current of 1.5 A through a solution of copper(II) sulfate for 50 minutes. If the mass of the copper metal obtained was 1.23 grams, calculate the Faraday constant using the following formula: Faraday constant = (mass of substance plated x molar mass of substance) / (current x time)

answered Feb 4 in ElectroChemistry

1 answer 70 views

Determine the rate law for the reaction of nitrogen dioxide with hydrogen gas, if the reaction rate is directly proportional to the concentration of nitrogen dioxide and the square of the concentration of hydrogen gas. Express the rate law in terms of the rate constant and the concentrations of the reactants.

answered Feb 4 in Chemical kinetics

1 answer 63 views

Calculate the standard enthalpy change of the formation of water (H2O) given the following data:- Standard enthalpy of formation of hydrogen gas (H2) = 0 kJ/mol- Standard enthalpy of formation of oxygen gas (O2) = 0 kJ/mol- Standard enthalpy of formation of water vapor (H2O(g)) = -241.8 kJ/mol

asked Feb 3 in Chemical thermodynamics

1 answer 44 views

How does the mechanism of carbon fixation during photosynthesis in plants involve the enzymes ribulose bisphosphate carboxylase-oxygenase (RuBisCO) and phosphoenolpyruvate carboxylase (PEPC) and what is its significance in the contribution of atmospheric CO2 absorption?

answered Jan 31 in BioChemistry

1 answer 121 views

How does an increase in pH affect the equilibrium position of the reaction between acetic acid and acetate ions? Provide a detailed explanation using Le Chatelier's principle.

asked Jan 31 in Chemical equilibrium

1 answer 107 views

What is the concentration of copper ions in a sample of wastewater collected from a factory using cyclic voltammetry?

answered Jan 30 in Analytical Chemistry

1 answer 73 views

Calculate the heat capacity of 50 grams of water at 25°C, given that the specific heat capacity of water is 4.18 J/g°C.

asked Jan 23 in Chemical thermodynamics

1 answer 80 views

Calculate the Gibbs free energy change at 25°C for the reaction:2NO(g) + O2(g) → 2NO2(g)Given the standard Gibbs free energy of formation at 25°C for NO(g), O2(g), and NO2(g) are +86.4 kJ/mol, 0 kJ/mol, and +51.3 kJ/mol, respectively.

answered Jan 23 in Chemical thermodynamics

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