Recent activity by KarolinBalse

1 answer 17 views

What is the optimum reaction time and temperature for the synthesis of polyethylene terephthalate from terephthalic acid and ethylene glycol, and how do these parameters affect the yield and molecular weight of the resulting polymer?

asked 5 days ago in Chemical synthesis

1 answer 21 views

How does the molecular structure of a compound affect its electric dipole moment, and how can it be predicted using ab initio calculations?

asked 6 days ago in Computational Chemistry

1 answer 37 views

How does the change in pH affect the rate of photochemical reactions in the presence of a photo-sensitizer thus causing a photo-induced electron transfer to occur?

asked Feb 18 in PhotoChemistry

1 answer 41 views

How does the chain length of a polymer affect its properties such as radius of gyration and viscosity? Use Monte Carlo simulations to analyze different chain lengths and predict the behavior of the polymer under different conditions.

answered Feb 18 in Computational Chemistry

1 answer 25 views

What is the bond order of carbon monoxide (CO) molecule?

answered Feb 18 in Chemical bonding

1 answer 26 views

How does the addition of cholesterol affect the fluidity and stability of a lipid bilayer composed of phospholipids?

answered Feb 17 in Computational Chemistry

1 answer 36 views

How can we increase diversity in the chemistry field and address the challenges faced by underrepresented groups?

asked Feb 13 in Chemical education

1 answer 39 views

How to design a system for the production of surfactants with maximum efficiency, using the minimum amount of raw materials and energy input, while ensuring safety measures and compliance with environmental regulations?

asked Feb 12 in Chemical engineering

1 answer 37 views

How does the coordination chemistry of metalloproteins and enzymes contribute to their biological function? Provide examples of specific metalloproteins and enzymes and explain the roles of the metal ions in their catalytic activity.

asked Feb 12 in Coordination Chemistry

1 answer 39 views

What are the coordination chemistry principles involved in chelation therapy, and how do they contribute to the effectiveness of the treatment for heavy metal poisoning?

asked Feb 12 in Coordination Chemistry

1 answer 37 views

How can the synthesis and characterization of new materials be optimized for increased efficiency and cost-effectiveness in the removal of heavy metals from water?

asked Feb 11 in Materials Chemistry

1 answer 47 views

How can the electronic and magnetic properties of molecular magnets be accurately predicted using quantum mechanical calculations?

asked Feb 7 in Quantum Chemistry

1 answer 40 views

How can improving the polymer electrolyte in a lithium-ion battery affect its performance and stability over time?

answered Feb 6 in Polymer Chemistry

1 answer 74 views

Here's a chemistry question for the student to solve: What is the predicted acidity or basicity of a molecule with the chemical formula CH3COOH? Provide a justification for your prediction based on the chemical structure and relevant chemical principles.

answered Feb 4 in Chemical bonding

1 answer 57 views

Calculate the standard enthalpy change for the reaction of the combustion of 1 mole of liquid ethanol (C2H5OH) at 298K and 1 atm. The balanced chemical equation for the reaction is: C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)Given:ΔHf°(C2H5OH(l)) = -277.7 kJ/molΔHf°(CO2(g)) = -393.5 kJ/molΔHf°(H2O(l)) = -285.8 kJ/molΔHf°(O2(g)) = 0 kJ/mol

answered Feb 3 in Chemical thermodynamics

1 answer 44 views

What are the molecular vibrations of carbon dioxide and how do they contribute to its infrared spectrum?

answered Jan 31 in Physical Chemistry

1 answer 98 views

Identify the structure of an unknown organic compound using nuclear magnetic resonance spectroscopy, given the following NMR spectrum and molecular formula (C7H14O2): Chemical shift (ppm) Integration0.87 — 3H (s)1.25 — 3H (s)1.45 — 2H (m)2.10 — 2H (t)2.80 — 1H (br s)4.00 — 1H (t)4.20 — 1H (br s)9.70 — 1H (s)

asked Jan 30 in Analytical Chemistry

1 answer 57 views

Calculate the enthalpy of ionization of hydrogen atom from hydrogen molecule given that the bond dissociation enthalpy of H2 is 432 kJ/mol and the electron affinity of H atom is -72.8 kJ/mol.

answered Jan 23 in ThermoChemistry

1 answer 61 views

Calculate the enthalpy of desorption for the process of magnesium oxide (MgO) surface drying at a temperature of 500 K, given that the equilibrium pressure of water vapor above the dried MgO is 0.056 atm and the enthalpy of adsorption of water on MgO is -44.48 kJ/mol.

asked Jan 23 in ThermoChemistry

1 answer 64 views

Calculate the corrosion potential for a pure iron (Fe) electrode in a 1 M HCl solution at 25°C, given that the standard reduction potential of Fe in acidic solution is -0.44 V.

answered Jan 23 in ElectroChemistry

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