Questions by MelbaTulloch

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1 answer 20 views

What is the mechanism for the reaction between acetic acid and thionyl chloride to form acetyl chloride?

asked 3 days ago in Organic Chemistry

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1 answer 14 views

What is the net ATP yield from the complete oxidation of one molecule of glucose in glycolysis?

asked 3 days ago in BioChemistry

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1 answer 28 views

How does the chemical composition and structure of polymer-based packaging materials impact their biodegradability and environmental impact?

asked Feb 18 in Polymer Chemistry

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1 answer 28 views

How does the activation energy of a chemical reaction affect its rate and mechanism?

asked Feb 17 in Quantum Chemistry

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1 answer 7 views

What is the general mechanism of photochemical reactions in organic compounds? Provide examples of such reactions and explain how the energy from light is translated into chemical changes within the molecule.

asked Feb 14 in PhotoChemistry

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1 answer 26 views

How do non-specific DNA-binding proteins help in the initiation of DNA replication and prevent errors during the process?

asked Feb 14 in BioChemistry

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1 answer 31 views

What is the role of metal ions in the catalytic activity of metalloenzymes and metalloproteins? Provide an example and explain the mechanism of the reaction with the coordination chemistry principles involved.

asked Feb 13 in Coordination Chemistry

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1 answer 47 views

How can the yield of the food additive production process be improved without compromising the purity and quality of the product?

asked Feb 13 in Chemical engineering

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1 answer 10 views

How can we design a new drug molecule that effectively reduces inflammation in the body without causing harmful side effects?

asked Feb 12 in Medicinal Chemistry

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1 answer 35 views

How can we design a drug that effectively targets specific neurotransmitter systems involved in the development of Alzheimer's disease, while avoiding off-target effects and minimizing side effects for patients?

asked Feb 12 in Medicinal Chemistry

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1 answer 42 views

What is the role of cholesterol in maintaining the fluidity and permeability of the cell membrane?

asked Feb 12 in BioChemistry

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1 answer 11 views

How can computational methods be used to design and predict the properties of supramolecular assemblies formed by organic molecules?

asked Feb 6 in Computational Chemistry

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1 answer 62 views

Determine the bond energy required to break all the bonds in a molecule of methane (CH4) and calculate the total energy required to break all the bonds in 4.0 moles of methane. (Assume the bond energy values are: C-H bond energy = 413 kJ/mol and C-C bond energy = 347 kJ/mol)

asked Feb 4 in Chemical reactions

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1 answer 60 views

How does changing the structure of a biomaterial affect its mechanical properties and ability to support cell growth for use in tissue engineering applications?

asked Feb 3 in Materials Chemistry

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1 answer 79 views

How do changes in the primary structure of a protein affect its function? Using hemoglobin as an example, explain how a single amino acid substitution can affect its ability to transport oxygen.

asked Jan 31 in BioChemistry

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1 answer 80 views

What are the specific properties of a solid that can help a chemist identify whether it has ionic, covalent or metallic bonding? Provide three examples, with a brief explanation of each.

asked Jan 30 in Chemical bonding

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1 answer 33 views

Calculate the Gibbs free energy change at 298 K for the reaction of hydrogen gas (H2) and chlorine gas (Cl2) to form hydrogen chloride gas (2HCl), given the following thermodynamic data:∆H°f (HCl) = -92.31 kJ/mol∆H°f (H2) = 0 kJ/mol∆H°f (Cl2) = 0 kJ/mol∆S°f (HCl) = -181.6 J/(mol*K)∆S°f (H2) = 130.7 J/(mol*K)∆S°f (Cl2) = 223.1 J/(mol*K)Also, determine whether the reaction is spontaneous at 298 K and if it will shift towards products or reactants.

asked Jan 23 in Chemical thermodynamics

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1 answer 66 views

Calculate the equilibrium constant (Kc) of the reaction below at 25°C with and without a catalyst and determine the effect of the catalyst on the equilibrium position.N2(g) + 3H2(g) ⇄ 2NH3(g)

asked Jan 23 in Chemical equilibrium

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1 answer 59 views

Calculate the enthalpy change (in kJ/mol) for the chemical reaction: C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l) Given the standard enthalpies of formation (ΔHf°) for C2H5OH(l) = -277.6 kJ/mol, CO2(g) = -393.5 kJ/mol, and H2O(l) = -285.8 kJ/mol.

asked Jan 23 in Chemical thermodynamics

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1 answer 63 views

A 0.50 L vessel contains 1.0 mol of N2(g) and 3.0 mol of H2(g) at equilibrium at 400 K according to the following equation:N2(g) + 3H2(g) ⇌ 2NH3(g)If the volume of the vessel is suddenly decreased to 0.25 L, what will happen to the equilibrium position? Will the concentration of NH3 increase or decrease? Calculate the new equilibrium constant at this new volume.

asked Jan 22 in Chemical equilibrium

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