Recent activity by ElkeMary0923

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What is the reactivity order of the following group 1 metal ions: Li+, Na+, K+, and Cs+ based on their electronic configuration?

asked Feb 24 in Inorganic Chemistry

1 answer 40 views

How does the presence of a catalyst affect the activation energy and rate of a chemical reaction?

answered Feb 22 in Physical Chemistry

1 answer 28 views

What is the optimum temperature and time required for the Preparation of p-nitroaniline from aniline and nitric acid, and how can the purity of the final product be improved?

answered Feb 22 in Chemical synthesis

1 answer 34 views

How does the crystallization temperature affect the morphology of polyethylene?

answered Feb 19 in Polymer Chemistry

1 answer 76 views

How do the body's amino acid biosynthesis pathways differ in individuals who consume a vegetarian or low-protein diet compared to those who consume a high-protein diet, and how can these differences impact overall health and metabolism?

answered Feb 13 in BioChemistry

1 answer 70 views

How do the electronic and optical properties of graphene differ from those of other 2D materials such as MoS2, and what factors contribute to these differences?

asked Feb 13 in Quantum Chemistry

1 answer 71 views

How can we effectively dispose of radioactive waste without harming the environment or public health?

answered Feb 13 in Environmental Chemistry

1 answer 63 views

What is the percentage purity of a given sample of aspirin when the melting point is determined to be 135°C? The literature melting point range for pure aspirin is 135-136°C.

asked Feb 12 in Analytical Chemistry

1 answer 66 views

How can the sensitivity and selectivity of polymer-based gas sensors be enhanced?

asked Feb 10 in Polymer Chemistry

1 answer 31 views

How can metal-organic frameworks (MOFs) be utilized for the storage and delivery of drugs, and what factors influence the drug release behavior from MOFs?

answered Feb 5 in Coordination Chemistry

1 answer 35 views

How can chemistry students overcome the challenge of limited availability of chemistry-related internships and job opportunities to gain relevant practical experience and enhance their chances of employability?

answered Feb 5 in Chemical education

1 answer 100 views

Determine the oxidation state of all elements in the following compound: CoCl<sub>2</sub>•6H<sub>2</sub>O.

asked Feb 4 in Inorganic Chemistry

1 answer 37 views

Considering carbohydrate metabolism and regulation in the human body, how does the regulation of glycolysis and gluconeogenesis work to maintain blood glucose levels during periods of fasting or intense exercise? Include both the enzymes involved and the hormonal regulation mechanisms in your answer.

answered Feb 3 in BioChemistry

1 answer 82 views

Calculate the standard enthalpy change for the phase transition reaction of solid iodine to iodine vapor using the following information:- Standard enthalpy of fusion of solid iodine = 15.52 kJ/mol- Standard enthalpy of vaporization of iodine = 41.57 kJ/mol- Heat capacity of solid iodine = 54.44 J/mol*K- Heat capacity of iodine vapor = 27.32 J/mol*K- Melting point of iodine = 386.85 K- Boiling point of iodine = 457.4 K

asked Feb 3 in Chemical thermodynamics

1 answer 100 views

How can the chemical engineering principles be applied to develop a cost-effective and efficient process for the production of a specific pharmaceutical drug, while ensuring the product's purity, potency and stability?

asked Jan 31 in Chemical engineering

1 answer 104 views

What is the dipole moment of a water molecule according to ab initio calculations, and how does it compare to the experimentally measured dipole moment?

answered Jan 30 in Computational Chemistry

1 answer 143 views

What type of bond is likely to form between a sulfur atom and a chlorine atom, and how is it determined?

answered Jan 30 in Chemical bonding

1 answer 73 views

How can the composition of a sample be determined using X-ray diffraction analysis and what specific information can be obtained from the analysis?

asked Jan 29 in Analytical Chemistry

1 answer 42 views

Assuming a chemical equilibrium reaction aA + bB ⇌ cC + dD, with initial concentrations of [A] = 0.2 M, [B] = 0.3 M, [C] = 0 M, and [D] = 0 M at 25°C, what will be the new equilibrium concentration of [B] if the volume of the container is decreased to half the original volume?

asked Jan 22 in Chemical equilibrium

1 answer 70 views

A chemistry student is given a sample of a solution containing a known amount of sodium chloride (NaCl) dissolved in water. The student needs to determine the concentration of the NaCl in the solution, using mass balance calculations. The student has access to a balance and other necessary laboratory equipment. What is the concentration of NaCl in the solution given to the student? How much NaCl is present in the solution, and how much water was used to dissolve it?

answered Jan 22 in Analytical Chemistry

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