Recent activity by ArnoldJanous

1 answer 19 views

What is the effect of pH on the structure and function of proteins? Provide specific examples and explain the underlying chemical mechanisms involved.

answered Feb 22 in BioChemistry

1 answer 32 views

What is the most effective remediation technology to remove heavy metal contaminants (e.g. lead, chromium or arsenic) from soil and groundwater in a contaminated site, and how can this method be optimized for maximum efficiency and sustainability?

asked Feb 21 in Environmental Chemistry

1 answer 27 views

Identify the type of inorganic compound formed by the combination of sodium and chlorine atoms. Is it ionic, covalent or metallic? Explain your answer.

asked Feb 20 in Inorganic Chemistry

1 answer 31 views

How does the electronic structure of a metal catalyst affect the activation energy of a specific reaction, as investigated through density functional theory calculations?

answered Feb 20 in Computational Chemistry

1 answer 27 views

What is the bond enthalpy of the carbon-hydrogen (C-H) bond in methane (CH4) ?

asked Feb 18 in Chemical bonding

1 answer 44 views

What is the boiling point of sodium chloride at a pressure of 1 atm?

answered Feb 14 in Inorganic Chemistry

1 answer 36 views

What factors affect the stability of inorganic compounds and how can we predict the stability of a given inorganic compound based on its chemical structure and properties?

asked Feb 14 in Inorganic Chemistry

1 answer 34 views

How can we optimize the synthesis reaction conditions, such as temperature and pressure, to enhance the crystal growth of metal-organic frameworks (MOFs) for more efficient gas separation?

asked Feb 14 in Materials Chemistry

1 answer 29 views

How does insulin regulate glucose metabolism in the body and what are the molecular mechanisms involved in insulin signaling pathway?

answered Feb 13 in BioChemistry

1 answer 57 views

How does the bond strength vary with the bond length and bond order in diatomic molecules? Provide examples of two different diatomic molecules to illustrate your answer and explain which molecule has a stronger bond and why.

answered Feb 13 in Chemical bonding

1 answer 36 views

How can the photochemical properties of photochromic materials be utilized in the development of smart glasses that can automatically adjust their tint based on the intensity of light?

asked Feb 10 in PhotoChemistry

1 answer 36 views

How can the optical properties of polymers be tailored to meet specific needs of various applications, such as in optical sensors or electronic displays, and what are the key factors that influence such modifications?

asked Feb 10 in Polymer Chemistry

1 answer 33 views

How can the mechanical properties of polymer-based smart materials be tailored to specific applications?

asked Feb 10 in Polymer Chemistry

1 answer 30 views

How can computational studies be used to predict and analyze the self-assembly behavior of supramolecular structures and their properties, such as stability and reactivity?

asked Feb 6 in Computational Chemistry

1 answer 37 views

How can chemistry educators provide better support to students with learning disabilities to engage them effectively in chemistry experiments and enhance their learning outcomes?

answered Feb 4 in Chemical education

1 answer 44 views

Calculate the standard enthalpy change for the following reaction involving solids at 298 K:Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) Given the following standard enthalpies of formation in kJ/mol: Fe2O3(s) = -825.5 Fe(s) = 0CO2(g) = -393.5 CO(g) = -110.5

asked Feb 3 in Chemical thermodynamics

1 answer 91 views

What parameters affect catalytic activity and selectivity in the hydrogenation of ethylene to ethane using a platinum-based catalyst?

answered Jan 31 in Physical Chemistry

1 answer 82 views

How does a change in the reaction mechanism affect the rate of reaction in a chemical reaction? Provide an experimental investigation to support your answer.

answered Jan 30 in Chemical kinetics

1 answer 76 views

Calculate the electronic energy levels and absorption spectra of a quantum dot composed of CdSe with a diameter of 5 nanometers and compare it to a quantum well with the same dimensions. Which structure would have a higher bandgap energy and why?

answered Jan 23 in Quantum Chemistry

1 answer 120 views

A sample of argon gas is contained in a container kept at constant volume. The temperature of the gas is slowly increased by step-wise increments. The energy absorbed by the sample at each increment is recorded, and the average energy of the gas at each temperature is calculated. Using this data, the student is asked to determine the heat capacity of the gas at constant volume and explain why this value only depends on the temperature of the system.

answered Jan 22 in Physical Chemistry

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