Recent activity by FerminRosale

1 answer 20 views

How does the selectivity of oxidation of hydrocarbons on metal surfaces change when the size of the metal nanoparticles is varied?

answered 2 days ago in Surface Chemistry

1 answer 20 views

What is the mechanism or pathway for the Photoisomerization of retinal in rhodopsin, and how is this process related to vision?

answered 5 days ago in Physical Chemistry

1 answer 8 views

What is the most effective method for the removal of persistent organic pollutants (POPs) from contaminated water sources, taking into consideration both environmental impact and cost?

answered 5 days ago in Environmental Chemistry

1 answer 20 views

How does the length and saturation level of fatty acid chains affect the behavior of lipid bilayers in molecular dynamics simulations?

answered 6 days ago in Computational Chemistry

1 answer 22 views

What is the effect of metal ion coordination on the electronic and spectroscopic properties of metalloporphyrins and metallophthalocyanines?

asked Feb 19 in Coordination Chemistry

1 answer 29 views

How does the addition of different metals and their respective compositions affect the tensile strength and corrosion resistance of a metal alloy used in aerospace applications?

answered Feb 17 in Materials Chemistry

1 answer 29 views

How does the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) catalyze the initial fixation of CO2 during photosynthesis, and what factors affect its efficiency in converting CO2 into organic carbon compounds?

answered Feb 14 in BioChemistry

1 answer 11 views

How can the synthesis and characterization of a new material be optimized for maximum efficiency in removing heavy metals from polluted water sources?

asked Feb 11 in Materials Chemistry

1 answer 57 views

How can the structure of existing anti-inflammatory drugs be optimized to improve their efficacy and reduce their side effects?

answered Feb 11 in Medicinal Chemistry

1 answer 44 views

How can the process for the production of phosphorus-based fertilizers be optimized for maximum yield and minimum waste?

asked Feb 10 in Chemical engineering

1 answer 29 views

How can one determine the isomerism of a molecule based on its molecular formula and molecular structure? Provide an example of a compound with different isomers and explain their differences in properties.

answered Feb 5 in Chemical bonding

1 answer 36 views

Design a heat exchanger for a chemical process that requires heating of 50 kg/hr of water from 25°C to 80°C using steam as the heating medium. The available steam is at a pressure of 1.5 MPa and a temperature of 300°C. The overall heat transfer coefficient between the water and the steam is 600 W/m2K. The heat exchanger should be designed to accommodate a temperature drop of 5°C for both the water and the steam. Determine the required surface area of the heat exchanger and the mass flow rate of steam required to meet the process requirements.

asked Feb 4 in Chemical engineering

1 answer 74 views

Calculate the standard enthalpy change (ΔH°) for the phase transition reaction of ice to water, given that the enthalpy of fusion for ice is 6.01 kJ/mol and the specific heat capacity of water is 4.18 J/g·°C. Express your answer in kJ/mol.

answered Feb 3 in Chemical thermodynamics

1 answer 46 views

Calculate the Gibbs free energy change (∆G) for the combustion of methane, CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l), at standard conditions (298 K and 1 atm pressure) using appropriate thermodynamic data.

asked Jan 23 in Chemical thermodynamics

1 answer 62 views

Calculate the enthalpy change of precipitation when 50 mL of 0.1 M calcium chloride solution is mixed with 50 mL of 0.1 M silver nitrate solution, assuming that the reaction goes to completion and the temperature remains constant at 25°C.

answered Jan 23 in ThermoChemistry

1 answer 65 views

Calculate the bond dissociation energy (in kJ/mol) for the breaking of the carbon-hydrogen (C-H) bond in methane (CH4), given the following information: CH4 (g) → CH3 (g) + H (g) ∆H = 432 kJ/mol Note: The bond dissociation energy is the amount of energy required to break a bond between two atoms in a molecule, resulting in two separate atoms.

asked Jan 23 in ThermoChemistry

1 answer 58 views

A chemical engineer wants to separate a mixture of ethanol and methanol using a distillation column. The feed to the column contains 30% ethanol and 70% methanol by mole. The engineer wants to obtain a distillate with 80% ethanol and a bottoms product containing no more than 1% ethanol. Determine the number of trays required in the distillation column to achieve this separation. Consider only equilibrium stages and assume that the feed is saturated liquid at its boiling point. The operating pressure of the column is 1 atm.

asked Jan 22 in Chemical engineering

1 answer 49 views

What is the oxidation state of nitrogen in N2O5?

asked Jan 21 in Inorganic Chemistry

1 answer 50 views

Determine the oxidation state of the central atom in the compound [Fe(CN)6]4-.

asked Jan 21 in Inorganic Chemistry

1 answer 47 views

What is the name of the theory that suggests that our behaviour can be explained by examining the functions it serves?

asked Jan 20 in Psychology

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