Recent activity by DaisyThwaite

1 answer 33 views

What is the relationship between the molecular weight and the glass transition temperature of a polymer? Provide experimental evidence to support your answer.

answered Feb 24 in Physical Chemistry

1 answer 34 views

What are the optimal reaction conditions for synthesizing polyurethane from diisocyanate and polyol, such that a high molecular weight and desirable material properties are achieved?

asked Feb 21 in Chemical synthesis

1 answer 29 views

What is the optimum temperature and concentration of nitric acid necessary for the most efficient and safe preparation of 2,4,6-trinitrotoluene from toluene using the nitration process?

asked Feb 21 in Chemical synthesis

1 answer 25 views

What is the most effective way to recover valuable metals, such as gold and silver, from electronic waste using chemical engineering principles and techniques?

asked Feb 21 in Chemical engineering

1 answer 27 views

What is the most cost-effective and efficient design for a hydrogen fuel production system, taking into account the energy input, byproduct management, and scalability of the production process?

answered Feb 21 in Chemical engineering

1 answer 30 views

What is the mechanism of action behind the photochemical properties of silver halides in photographic materials, and how does this lead to the formation of a visible image?

asked Feb 20 in PhotoChemistry

1 answer 29 views

What is the effect of ionic strength on the stability and behavior of colloidal particles and how can it be controlled or manipulated?

answered Feb 20 in Physical Chemistry

1 answer 26 views

What is the role of coordination number in the color of transition metal complexes?

answered Feb 19 in Coordination Chemistry

1 answer 25 views

How does the coordination chemistry of metalloenzymes and metalloproteins affect their catalytic activity in biological systems?

answered Feb 19 in Coordination Chemistry

1 answer 57 views

What can be done to improve the availability of chemistry textbooks and resources for students in underprivileged and rural areas who may not have access to adequate educational materials?

answered Feb 13 in Chemical education

1 answer 38 views

How can we design drugs to effectively target and treat gram-negative bacteria, such as E. coli, while minimizing harm to human cells?

asked Feb 12 in Medicinal Chemistry

1 answer 63 views

What are the design principles and challenges in developing drugs that target specific genetic mutations implicated in diseases like cystic fibrosis and Huntington's disease? How can these drugs be optimized for maximum efficacy and minimal side-effects?

asked Feb 12 in Medicinal Chemistry

1 answer 61 views

How can the synthesis and characterization of new materials be optimized to enhance the efficiency of solar cells and increase their lifespan?

asked Feb 11 in Materials Chemistry

1 answer 74 views

How can the size and shape of metal nanoparticles be controlled using various synthesis methods and how does this affect their physical and chemical properties?

answered Feb 10 in Materials Chemistry

1 answer 34 views

How can the incorporation of carbon nanotubes and graphene oxide in polymer-based composites enhance the mechanical properties and durability of aerospace materials?

asked Feb 7 in Polymer Chemistry

1 answer 37 views

How can the adhesive strength of a polymer-based adhesive be optimized while ensuring that it remains environmentally sustainable?

asked Feb 6 in Polymer Chemistry

1 answer 83 views

Determine the type of inorganic solid formed between Strontium (Sr) and Oxygen (O) based on their electronegativities and bonding behavior. Is it ionic, covalent or metallic?

asked Feb 4 in Inorganic Chemistry

1 answer 51 views

Calculate the standard free energy change for the following redox reaction at 25°C:2Fe(s) + 3/2 O2(g) -> Fe2O3(s)Given the following half-reactions and their standard reduction potentials at 25°C:Fe2O3(s) + 3H2O(l) + 2e- -> 2Fe(OH)3(s) E°= -0.33VO2(g) + 4H+(aq) + 4e- -> 2H2O(l) E°= +1.23VFe(OH)3(s) -> Fe3+(aq) + 3OH-(aq) E°= -0.25V

asked Feb 3 in Chemical thermodynamics

1 answer 59 views

Calculate the standard cell potential for the following electrochemical reaction: Zn (s) + 2 Ag+ (aq) → Zn2+ (aq) + 2 Ag (s)Given: Standard Reduction Potentials are E°Zn2+ = -0.76 V, E°Ag+ = 0.80 V.

asked Feb 3 in ElectroChemistry

1 answer 71 views

Calculate the enthalpy change of solution for 2.0 moles of sodium chloride in 500.0 mL of water at 25°C. The molar heat of solution of sodium chloride is -3.91 kJ/mol.

asked Jan 23 in ThermoChemistry

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