Recent activity by ChristianeBo

1 answer 37 views

Which rearrangement reaction occurs when 2-bromopentane is treated with sodium ethoxide in ethanol, and what is the mechanism of this reaction?

asked Feb 24 in Organic Chemistry

1 answer 33 views

What is the most efficient catalyst to use in the synthesis of polyethylene terephthalate from terephthalic acid and ethylene glycol, and how does varying the amount of catalyst affect the yield and quality of the final product?

answered Feb 21 in Chemical synthesis

1 answer 32 views

What is the most effective synthesis method for producing a high-performance catalyst material for use in fuel cells, and how can its properties be characterized and optimized to improve fuel cell efficiency and durability?

answered Feb 21 in Materials Chemistry

1 answer 26 views

What is the most effective method for synthesizing and characterizing coordination compounds with a metal-ligand bond length of less than 2 angstroms?

asked Feb 21 in Coordination Chemistry

1 answer 32 views

What is the electronic configuration of the carbon monoxide (CO) molecule? Using quantum mechanics principles, calculate the bond order and predict the bond length of the CO molecule.

answered Feb 20 in Physical Chemistry

1 answer 43 views

Using the Arrhenius equation, calculate the activation energy for a first-order reaction that has a rate constant of 0.005 s^-1 at 25°C and 0.01 s^-1 at 35°C.

asked Feb 17 in Physical Chemistry

1 answer 29 views

What is the mechanism for the acid-catalyzed hydration of alkenes and its intermediates?

asked Feb 17 in Organic Chemistry

1 answer 38 views

What are the key photochemical properties of silver halide crystals used in traditional black and white photography and how do these properties contribute to the formation of an image on photographic film?

answered Feb 14 in PhotoChemistry

1 answer 73 views

What is the balanced chemical equation for the single replacement reaction between iron (Fe) and hydrochloric acid (HCl)?

asked Feb 13 in Chemical reactions

1 answer 74 views

How do changes in pH and temperature affect the activity of the enzyme catalase in breaking down hydrogen peroxide?

asked Feb 13 in BioChemistry

1 answer 89 views

How can we design drugs to selectively target specific metabolic pathways in the body, such as those involved in glucose regulation, and minimize off-target effects that could potentially harm the patient?

answered Feb 12 in Medicinal Chemistry

1 answer 29 views

How can we design a drug to treat a genetic disorder caused by abnormal protein folding?

answered Feb 12 in Medicinal Chemistry

1 answer 31 views

How can the synthesis of metal nanoparticles be optimized for size and shape in order to improve their catalytic activity and stability?

answered Feb 11 in Materials Chemistry

1 answer 73 views

How can the structure and properties of coordination polymers and metal-organic frameworks be manipulated for specific applications such as gas storage, catalysis, or drug delivery?

answered Feb 11 in Coordination Chemistry

1 answer 38 views

How can chemistry teachers provide better support to students with learning disabilities in the classroom, in terms of instructional strategies and accommodations, to facilitate and enhance their learning and success in chemistry?

asked Feb 5 in Chemical education

1 answer 73 views

Calculate the melting point of a solution containing 20 g of benzoic acid (C6H5COOH) and 80 g of naphthalene (C10H8). The melting points of pure benzoic acid and naphthalene are 122.4 °C and 80.2 °C, respectively. The molal freezing point depression constant for naphthalene is 6.8°C/m.

answered Jan 23 in Physical Chemistry

1 answer 75 views

Calculate the amount of copper deposited on the cathode when a current of 5 amperes is passed through a copper sulfate solution for a duration of 30 minutes. The molar mass of copper is 63.55 g/mol and the Faraday constant is 96500 C/mol. The electrode area is 10 cm² and the copper sulfate solution has a concentration of 0.1 M. Assume 100% efficiency in the electrochemical reaction.

asked Jan 23 in ElectroChemistry

1 answer 73 views

An unknown compound is synthesized in the lab and needs to be identified using mass spectrometry. Design a step-by-step plan to analyze the compound, including sample preparation, instrument settings, interpretation of data, and identification of possible functional groups.

answered Jan 22 in Analytical Chemistry

1 answer 88 views

A chemistry student wants to determine the percent composition of calcium oxide in a given sample of limestone. The student does an experiment and obtains the mass of the limestone sample, the mass of carbon dioxide evolved upon heating the limestone, and the mass of calcium oxide left behind. Using mass balance calculations, determine the percent composition of calcium oxide in the limestone sample.

answered Jan 22 in Analytical Chemistry

1 answer 94 views

A 0.1 M solution of ammonia (NH3) has a pH of 11.64 at room temperature. If sodium hydroxide (NaOH) is added to this solution such that the concentration of OH- ions becomes 0.01 M, what will be the new pH of the solution? (Assume that the dissociation of water can be ignored)

answered Jan 22 in Chemical equilibrium

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