Recent activity by LouellaComo

1 answer 18 views

What is the predicted molecular geometry of a molecule with a central atom that is surrounded by two bonding pairs and two lone pairs of electrons?

answered 5 days ago in Chemical bonding

1 answer 25 views

What is the isomerism of the molecule CH3CH=CHCH3 and how many isomers it has?

asked 6 days ago in Chemical bonding

1 answer 21 views

What is the critical micelle concentration (CMC) of sodium dodecyl sulfate (SDS) in water at 30°C? Provide a detailed explanation of the factors affecting the formation of micelles and how they relate to the CMC of SDS.

answered Feb 19 in Surface Chemistry

1 answer 23 views

What is the bond enthalpy of the carbon-oxygen double bond in carbon dioxide (CO2)?

asked Feb 18 in Chemical bonding

1 answer 34 views

How can we optimize the chemical structure of existing bronchodilator drugs to improve their efficacy and reduce their side effects for the treatment of respiratory diseases such as asthma and chronic obstructive pulmonary disease (COPD)?

answered Feb 14 in Medicinal Chemistry

1 answer 10 views

How can the synthesis of novel compounds with anti-inflammatory activity be optimized in medicinal chemistry? What specific chemical modifications can be made to improve the efficacy and selectivity of these compounds in treating inflammatory diseases?

answered Feb 11 in Medicinal Chemistry

1 answer 51 views

How can the surface properties of polymers be modified to enhance adhesion between two different polymer surfaces?

asked Feb 11 in Polymer Chemistry

1 answer 36 views

How can the production process of a specific specialty chemical be optimized to increase yield and reduce waste while maintaining product quality and purity?

asked Feb 10 in Chemical engineering

1 answer 31 views

How can the principles of chemistry be applied to real-world situations, such as the production of food additives or the development of new medicines?

answered Feb 10 in Chemical education

1 answer 42 views

How can the efficiency of a lubricant production system be improved through chemical and process optimization?

answered Feb 7 in Chemical engineering

1 answer 34 views

How can the adhesive properties of a polymer be optimized for a specific application, such as bonding two different materials with varying surface energies?

asked Feb 6 in Polymer Chemistry

1 answer 31 views

How can chemistry teachers or institutions provide adequate and effective hands-on experimentation opportunities for students, despite limited resources and equipment?

answered Feb 5 in Chemical education

1 answer 41 views

How can schools and universities increase the availability and accessibility of chemistry-related extracurricular activities for students who are interested in pursuing a career in chemistry?

asked Feb 5 in Chemical education

1 answer 68 views

Design a distillation column to separate a mixture of ethanol and water with an initial composition of 40% ethanol and 60% water. The column should achieve a separation of at least 95% ethanol in the distillate product. The available packing materials are Pall rings with a diameter of 1.5 inches and a height of 2 inches. The column inlet flow rate is 1000 kg/hr with a pressure of 1 atm and a temperature of 80°C. The column should have 25 theoretical plates and operate at reflux ratios ranging from 1.5 to 3.0. Additionally, the column diameter should not exceed 3 feet. Provide the design calculations and specifications for the distillation column.

asked Feb 4 in Chemical engineering

1 answer 52 views

Calculate the standard enthalpy change (ΔH°) for the following reaction involving the coordination compound [Fe(H2O)6]2+:[Fe(H2O)6]2+(aq) + 2Cl-(aq) → [FeCl2(H2O)4](aq) + 2H2O(l) Given: ΔH°f [FeCl2(H2O)4](aq) = -334 kJ/mol ΔH°f [Fe(H2O)6]2+(aq) = -393 kJ/mol ΔH°f H2O(l) = -286 kJ/mol Note: The superscript ° denotes standard conditions (i.e. 1 atm and 25°C) and the superscript f denotes standard enthalpy of formation.

answered Feb 3 in Chemical thermodynamics

1 answer 88 views

How does alternative splicing affect the structure and function of proteins produced by a single gene? Provide an example of a protein that undergoes alternative splicing and explain the different functional consequences of the spliced variants.

asked Jan 31 in BioChemistry

1 answer 73 views

Identify the structure of an unknown compound with a mass-to-charge ratio (m/z) of 112 using mass spectrometry. What is the molecular formula of the compound based on the information obtained from the mass spectrum?

asked Jan 30 in Analytical Chemistry

1 answer 49 views

How can electrophoresis be used to determine the composition and concentration of different proteins in a biological sample?

asked Jan 29 in Analytical Chemistry

1 answer 47 views

Calculate the heat of crystallization (in kJ/mol) of NaOH if 25g of NaOH dissolves in 100g of water at 25°C and releases 4.75kJ of heat.

asked Jan 23 in ThermoChemistry

1 answer 50 views

Calculate the enthalpy change of adsorption for the adsorption of CO gas on activated carbon at 25°C, given that the equilibrium constant for the reaction is 1.5×10^3 L/mol and the molar density of CO is 1.25 g/L. The surface area of activated carbon used is 50 m^2/g, and the initial pressure of CO is 2.5 atm.

answered Jan 23 in ThermoChemistry

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