Questions by MarianneBarc

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1 answer 19 views

What is the mechanism involved in the preparation of phenylalanine from benzyl chloride and ammonia, and how can it be optimized to increase the yield of the product?

asked 3 days ago in Chemical synthesis

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1 answer 20 views

What is the coordination geometry of a cobalt(III) complex with the empirical formula CoCl3(NH3)3? Use spectroscopic techniques to support your answer.

asked 6 days ago in Coordination Chemistry

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1 answer 31 views

How does the coordination chemistry of lanthanide and actinide complexes differ from that of other transition metals?

asked 6 days ago in Coordination Chemistry

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1 answer 31 views

What factors affect the efficiency of photovoltaic materials in converting light energy into electrical energy, and how can these factors be optimized through modifications in the chemical structure and composition of the materials?

asked Feb 14 in PhotoChemistry

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1 answer 40 views

How does insulin influence the synthesis and breakdown of glycogen in the liver, and what regulatory enzymes are involved in this process?

asked Feb 13 in BioChemistry

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1 answer 44 views

How does eutrophication affect the concentration of dissolved oxygen in aquatic ecosystems and what are the consequences of low oxygen levels on the survival of aquatic organisms?

asked Feb 13 in Environmental Chemistry

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1 answer 41 views

What is the effect of doping with various elements on the critical temperature and critical magnetic fields in superconducting materials?

asked Feb 12 in Materials Chemistry

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1 answer 41 views

How can magnetic nanoparticles be synthesized and characterized for efficient drug delivery?

asked Feb 6 in Materials Chemistry

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1 answer 40 views

How can chemists modify the chemical structure of existing antibiotics to overcome drug-resistant bacterial infections like MRSA (Methicillin-Resistant Staphylococcus Aureus)?

asked Feb 5 in Medicinal Chemistry

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1 answer 25 views

How can chemistry teachers provide adequate support for students with learning disabilities in the classroom to ensure their success in the subject?

asked Feb 5 in Chemical education

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1 answer 27 views

How can chemistry students gain practical experience in the field when the availability of chemistry-related internships and job opportunities is limited?

asked Feb 5 in Chemical education

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1 answer 47 views

Here's a precise problem for a chemistry student to solve in Organic Synthesis and Retrosynthesis:Develop a retrosynthesis approach to synthesize 2-methyl-1-phenylpropan-1-ol, starting from benzene, propene, and any other necessary reagents, explaining each step in the backward reaction sequence.

asked Feb 4 in Organic Chemistry

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1 answer 40 views

Calculate the standard enthalpy change for the vaporization of 100 g of water at 100°C given that the enthalpy of vaporization of water is 40.7 kJ/mol.

asked Feb 3 in Chemical thermodynamics

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1 answer 54 views

Calculate the standard enthalpy change (ΔH°) for the reaction:2H2(g) + O2(g) → 2H2O(g)given the following bond energies:H-H = 436 kJ/mol, O=O = 498 kJ/mol, H-O = 463 kJ/mol

asked Feb 3 in Quantum Chemistry

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1 answer 69 views

How do changes in the metabolite concentrations of specific pathways impact the overall cellular metabolism and how can this be studied using systems biology approaches?

asked Jan 31 in BioChemistry

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1 answer 12 views

How can a medicinal chemist utilize structure-based drug design to develop new treatments for respiratory diseases such as asthma, COPD, and cystic fibrosis?

asked Jan 30 in Medicinal Chemistry

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1 answer 55 views

Calculate the enthalpy change for the following reaction using Hess's Law: 2SO3(g) → 2SO2(g) + O2(g)Given the following enthalpy changes:2SO3(g) + ΔH1 → 2SO2(g) + O2(g); ΔH1 = 198.2 kJ/molSO2(g) + 1/2O2(g) + ΔH2 → SO3(g); ΔH2 = -98.9 kJ/mol

asked Jan 23 in Chemical reactions

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1 answer 57 views

Calculate the bond dissociation energy (in kJ/mol) of the C-H bond in methane (CH4) using the following given data:- Enthalpy of formation of methane (CH4) = -74.8 kJ/mol- Enthalpy of combustion of methane (CH4) = -890.4 kJ/mol- Enthalpy change for the breaking of all four C-H bonds in methane = 1665 kJ/mol.

asked Jan 23 in ThermoChemistry

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1 answer 88 views

What products are expected from the reaction of 1-bromobutane with sodium hydroxide in aqueous solution, and why?

asked Jan 21 in Organic Chemistry

0 votes

0 answers 35 views

When did Tukey introduce the p-value?

asked Jan 17 in Psychology

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