Recent activity by HeleneHoward

1 answer 26 views

What is the optimal ratio of salicylic acid and acetic anhydride to produce the highest yield of aspirin in the synthesis process?

answered Feb 21 in Chemical synthesis

1 answer 28 views

What is the mechanism of photo-induced chemical reactions in silver halide crystals, and how does this explain the photosensitivity of photographic materials?

answered Feb 20 in PhotoChemistry

1 answer 31 views

What is the reaction mechanism of the hydration reaction of propyne, and what is the product formed?

asked Feb 20 in Organic Chemistry

1 answer 32 views

What is the electronegativity difference between a fluorine atom (electronegativity value of 4.0) and a lithium atom (electronegativity value of 0.98)?

answered Feb 20 in Chemical bonding

1 answer 29 views

What are the key factors that affect the efficiency of polymer-based photovoltaic materials and how can they be optimized to improve their performance?

answered Feb 20 in Polymer Chemistry

1 answer 31 views

How does the concept of bonding and molecular structure explain the difference in reactivity between ethanol and propanol? Use quantum mechanics principles to support your explanation.

answered Feb 19 in Physical Chemistry

1 answer 31 views

How does the coordination number and geometry of metallofullerenes and metalloclusters affect their electronic and magnetic properties?

asked Feb 19 in Coordination Chemistry

1 answer 30 views

How does the coordination chemistry of metalloenzymes such as carbonic anhydrase affect their enzymatic activity?

answered Feb 19 in Coordination Chemistry

1 answer 38 views

How does the coordination chemistry of metalloenzymes and metalloproteins affect their enzymatic activity and how can this knowledge be applied in the development of metal-based drugs targeting specific enzymes?

answered Feb 19 in Coordination Chemistry

1 answer 31 views

How does the coordination chemistry of metalloenzymes and metalloproteins influence enzymatic activity? Provide examples of metalloenzymes and metalloproteins and explain how their coordination chemistry affects their function.

asked Feb 19 in Coordination Chemistry

1 answer 29 views

How does the concentration of sulfur dioxide emissions from a local power plant affect the pH levels of nearby bodies of water and what are the potential ecological impacts of this change in acidity on aquatic organisms?

asked Feb 19 in Environmental Chemistry

1 answer 28 views

How does the absorption spectra of naphthalene change upon rotation around the C-C bond in its excited state, and what insights can it provide into the electronic properties of the molecule?

asked Feb 17 in Computational Chemistry

1 answer 36 views

What are the main sources of soil contamination and how do they affect the growth and productivity of crops in agriculture?

answered Feb 14 in Environmental Chemistry

1 answer 38 views

How does the mechanism of photochemical reactions differ for alkenes, alkanes, and aromatic compounds in organic chemistry?

asked Feb 14 in PhotoChemistry

1 answer 27 views

What is the role of the metal ion in the coordination chemistry of metalloenzymes and metalloproteins, and how does its coordination environment affect enzymatic activity?

asked Feb 13 in Coordination Chemistry

1 answer 60 views

How can we design a system using chemical engineering principles and technology to recover valuable metals such as gold and copper from electronic waste efficiently and sustainably?

asked Feb 12 in Chemical engineering

1 answer 82 views

How can the sensitivity and selectivity of polymer-based sensors for detecting heavy metal ions be improved?

asked Feb 10 in Polymer Chemistry

1 answer 66 views

How can the process parameters, such as temperature, feed ratio, and catalyst concentration, be optimized to achieve maximum polymer yield and quality in the production of polyethylene using the high-pressure polymerization method?

answered Feb 10 in Chemical engineering

1 answer 41 views

How can the optical and electrical properties of liquid crystals be tuned to improve the efficiency and performance of liquid crystal displays?

asked Feb 10 in Materials Chemistry

1 answer 39 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?

answered Feb 5 in Chemical education

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