Recent activity by CarmineGaric

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How does the size and shape of magnetic particles in a storage device affect its data storage capacity and stability?

1 answer 31 views

What factors determine the selectivity of a chemical reaction and how can we predict the outcome using quantum chemistry calculations?

answered Feb 24 in Quantum Chemistry

1 answer 29 views

What is the effect of the concentration of sulfuric acid and zinc on the rate of the reaction between them, when hydrogen gas is evolved? How will the rate be affected when lead sulfate is formed as a product of the reaction?

answered Feb 22 in Chemical kinetics

1 answer 32 views

What is the effect of initial concentration on the reaction rate and yield in the reaction between magnesium and hydrochloric acid?

answered Feb 22 in Chemical kinetics

1 answer 33 views

How does the presence of reaction intermediates affect the overall reaction rate in the reaction between hydrogen peroxide and iodide ions, and how can this be experimentally investigated and measured?

answered Feb 22 in Chemical kinetics

1 answer 30 views

What is the optimum reaction condition (temperature, pressure, and catalyst) required for the synthesis of polyethylene terephthalate (PET) using terephthalic acid and ethylene glycol as starting materials?

answered Feb 22 in Chemical synthesis

1 answer 28 views

What will happen to the equilibrium position of a chemical reaction when the pressure is increased, decreased or kept constant? Provide an explanation and specific examples to support your answer.

answered Feb 19 in Chemical equilibrium

1 answer 43 views

How does the chemical composition of a photochromic material affect its photochromic properties, and how can these properties be optimized for specific applications?

asked Feb 18 in PhotoChemistry

1 answer 32 views

How does the addition of different dopants affect the thermal conductivity and expansion coefficient of alumina ceramics, commonly used in high-temperature applications?

answered Feb 17 in Materials Chemistry

1 answer 40 views

How can we reduce the carbon footprint of an industrial process while maintaining its efficiency and productivity? Provide specific strategies and examples of their implementation in industry.

answered Feb 14 in Environmental Chemistry

1 answer 55 views

What is the oxidation state of sulfur in the compound SO3?

answered Feb 13 in ElectroChemistry

1 answer 87 views

What are the metabolic pathways involved in the biosynthesis of the non-essential amino acids in humans, and how do these pathways differ from those involved in the biosynthesis of essential amino acids?

asked Feb 13 in BioChemistry

1 answer 80 views

How does the coordination chemistry of metalloenzymes and metalloproteins contribute to their catalytic activity? Provide an example of a metalloenzyme or metalloprotein and explain the role of the metal ion in its catalytic mechanism.

answered Feb 12 in Coordination Chemistry

1 answer 58 views

What can chemistry educators do to spark and maintain students' interest in the subject, and how can they better communicate the practical applications of chemistry in real-world situations?

asked Feb 12 in Chemical education

1 answer 112 views

How can the size, shape, and composition of nanoparticles be precisely controlled during their synthesis using green chemistry principles to minimize environmental impact?

answered Feb 10 in Materials Chemistry

1 answer 61 views

How can magnetic nanoparticles be synthesized and characterized for efficient drug delivery?

asked Feb 6 in Materials Chemistry

1 answer 86 views

How does changing the concentration of the reactants affect the equilibrium constant and the reaction rate of the reaction between iodine and propanone in acidic solution?

answered Feb 3 in Chemical kinetics

1 answer 70 views

Calculate the enthalpy change for the isomerization of n-butane to iso-butane if the standard enthalpy of formation for n-butane is -125.7 kJ/mol and that for iso-butane is -147.4 kJ/mol. The isomerization reaction occurs at a constant pressure of 1 atm and at a temperature of 298 K.

asked Jan 23 in ThermoChemistry

1 answer 76 views

Calculate the bond dissociation energy for the C-H bond in methane (CH4) using the following data:- The heat of combustion of methane is -890 kJ/mol.- The enthalpy of formation of CO2 is -393.5 kJ/mol.- The enthalpy of formation of H2O is -285.8 kJ/mol.- The heat of combustion of hydrogen is -286 kJ/mol.

answered Jan 23 in ThermoChemistry

1 answer 107 views

A student needs to prepare a solution containing 50 g of ethanol (C2H5OH) dissolved in 250 g of water (H2O) at 25°C. Assuming the heat of mixing for ethanol and water is -5.02 kJ/mol, calculate the heat released or absorbed when the two substances are mixed. Express your answer in kJ.

asked Jan 22 in ThermoChemistry

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