Recent activity by FredrickNobe

1 answer 32 views

How does the reaction rate of a chemical reaction change when the solvent is changed from water to ethanol?

asked Feb 22 in Chemical kinetics

1 answer 90 views

How does the photochemical properties of dyes and pigments affect their color stability under sunlight exposure?

answered Feb 22 in PhotoChemistry

1 answer 80 views

How does the photochemical behavior of metal complexes change with regards to their ligand environment?

asked Feb 22 in PhotoChemistry

1 answer 79 views

How does the molecular structure of liquid crystal compounds affect their phase transition temperatures and optical properties?

asked Feb 21 in Physical Chemistry

1 answer 91 views

What is the effect of temperature on the rate of polymerization of vinyl monomers using a free radical mechanism? Provide a detailed explanation and include graphical representation of data obtained from experiments.

asked Feb 20 in Polymer Chemistry

1 answer 86 views

How does the binding affinity between a protein and a small molecule ligand change when the temperature is increased in a molecular dynamics simulation?

answered Feb 17 in Computational Chemistry

1 answer 73 views

What is the balanced chemical equation for the synthesis reaction of magnesium oxide (MgO) when magnesium (Mg) reacts with oxygen gas (O2)?

asked Feb 17 in Chemical reactions

1 answer 85 views

What is the balanced chemical equation for the precipitation reaction of lead nitrate (Pb(NO3)2) and potassium iodide (KI)? What product is formed, and how much of this product would be produced from 25 grams of each reactant?

asked Feb 17 in Chemical reactions

1 answer 118 views

How do intermolecular interactions and solvation effects influence the solubility of ionic compounds in polar solvents?

answered Feb 13 in Quantum Chemistry

1 answer 141 views

What type of bonding is present in solid sodium chloride (NaCl)? Provide a detailed explanation of the characteristics of this type of bonding and explain why it is exhibited in NaCl.

asked Feb 13 in Chemical bonding

1 answer 79 views

How does the presence of cholesterol affect the signaling and metabolism of lipids in cells? Provide a detailed explanation of the molecular mechanisms involved and their potential implications on cellular function.

answered Feb 12 in BioChemistry

1 answer 98 views

How can the photochemical properties of supramolecular assemblies be manipulated by varying the composition of the assembly?

answered Feb 10 in PhotoChemistry

1 answer 88 views

How can the composition of metal alloys be optimized to enhance their strength, durability, and resistance to high temperatures for aerospace applications?

answered Feb 6 in Materials Chemistry

1 answer 134 views

Determine the oxidation state of the following elements in the compound potassium permanganate (KMnO4): a) Potassium b) Manganese c) Oxygen

answered Feb 4 in ElectroChemistry

1 answer 202 views

Design a heat exchanger for a factory that produces 10,000 liters of sulfuric acid per day starting at 70°C and needs to be cooled to 40°C for packaging. The available cooling water supply from the local municipal is at 20°C and is available at a flow rate of 1000 liters per minute. Design the heat exchanger to achieve the required temperature drop and calculate the heat transfer coefficient and the overall heat transfer coefficient.

asked Feb 4 in Chemical engineering

1 answer 175 views

Calculate the polarization that occurs in an electrochemical cell when a current of 2 A flows through it for 10 minutes. The electrode area is 25 cm², and the current efficiency is 95%. The activation energy is 80 kJ/mol, and the reaction quotient is 2.5 x 10⁻⁵. The temperature of the cell is 25°C. Find the polarization resistance and the total polarization of the cell.

answered Feb 3 in ElectroChemistry

1 answer 102 views

Calculate the pH of a buffer solution made by combining equal volumes of 0.1 M acetic acid and 0.1 M sodium acetate. The dissociation constant of acetic acid is 1.8 × 10^-5.

answered Feb 3 in Chemical reactions

1 answer 146 views

What is the standard enthalpy change for the combustion of methane (CH4) gas to form carbon dioxide (CO2) gas and water (H2O) at 298 K? Use quantum chemistry calculations to determine the necessary thermodynamic properties of CH4, CO2, and H2O to solve the problem.

answered Jan 31 in Quantum Chemistry

1 answer 192 views

What functional groups are present in an unknown organic compound with a molecular formula of C6H12O2, as determined by infrared spectroscopy?

asked Jan 30 in Analytical Chemistry

1 answer 92 views

Calculate the cell potential for the following electrochemical reaction: Cu(s) + 2 Ag⁺(aq) → Cu²⁺(aq) + 2 Ag(s) Given that the standard reduction potentials are: Cu²⁺(aq) + 2e⁻ → Cu(s) E° = +0.34 V Ag⁺(aq) + e⁻ → Ag(s) E° = +0.80 V

answered Jan 23 in ElectroChemistry

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