Recent activity by Eileen22S142

1 answer 30 views

What is the relationship between light intensity and the rate of photochemical reactions in the presence of a certain photosensitive molecule? How does this relationship vary with changes in the intensity and wavelength of light used?

answered Feb 24 in PhotoChemistry

1 answer 30 views

What is the rate law expression for the reaction A + 2B → C, if the reaction is second order with respect to A and first order with respect to B? Also, write down the overall order of the reaction.

answered Feb 22 in Physical Chemistry

1 answer 31 views

What is the most effective protecting group for a primary alcohol during esterification, and why?

answered Feb 21 in Organic Chemistry

1 answer 34 views

What is the maximum theoretical yield of aspirin that can be obtained from the reaction between salicylic acid and acetic anhydride, and how does the presence of impurities affect the actual yield achieved in the reaction?

answered Feb 20 in Chemical synthesis

1 answer 31 views

How does the choice of metal catalyst affect the selectivity of oxidation reactions on hydrocarbons, and what are the key factors influencing the overall efficiency of the reaction?

answered Feb 18 in Surface Chemistry

1 answer 26 views

How does the addition of nitrogen to graphene affect its electronic properties and potential use in electronic devices?

asked Feb 17 in Materials Chemistry

1 answer 48 views

How does the acidity or basicity of the surface affect the adsorption of reactants on a catalyst in heterogeneous catalysis?

asked Feb 17 in Surface Chemistry

1 answer 39 views

What methods can be used to predict the electronic and magnetic properties of molecular magnets and how accurate are these predictions compared to experimental results?

asked Feb 14 in Quantum Chemistry

1 answer 40 views

How can we explain the periodic trends, such as electronegativity and ionization energy, across the rows and columns of the periodic table? And how do these trends affect the behavior and properties of chemical elements?

answered Feb 14 in Chemical education

1 answer 68 views

What is the relationship between the two enantiomers of a molecule and their physical and chemical properties?

asked Feb 13 in Organic Chemistry

1 answer 54 views

How does the photochemical behavior of enantiomers differ and how can this difference be utilized in various practical applications?

answered Feb 13 in PhotoChemistry

1 answer 70 views

What is the effect of crosslinking on the mechanical properties of polymeric materials used in biomedical applications?

answered Feb 12 in Materials Chemistry

1 answer 46 views

How do the chemical dispersants used to clean up oil spills affect the surrounding environment and what are the most effective and least damaging types of dispersants to use?

asked Feb 12 in Environmental Chemistry

1 answer 37 views

How can the electrical conductivity of conductive polymers be optimized for use in flexible electronics, while maintaining the desired mechanical properties of the material?

asked Feb 7 in Materials Chemistry

1 answer 36 views

How can the efficiency of polymer-based photovoltaic materials be improved by optimizing their chemical structure and composition?

asked Feb 7 in Polymer Chemistry

1 answer 49 views

How can different types of diisocyanates and polyols be optimally combined to synthesize polyurethane with desirable mechanical, thermal, and chemical properties?

answered Feb 5 in Chemical synthesis

1 answer 42 views

How can quantum chemical calculations be effectively used to predict and analyze the strength and nature of non-covalent interactions, such as hydrogen bonding or van der Waals interactions, between molecules in a complex chemical system?

answered Feb 5 in Computational Chemistry

1 answer 43 views

How can knowledge of chemistry principles be applied to real-world scenarios such as the production and use of common household items such as laundry detergent or shampoo? What are some of the key chemical processes involved in their creation and use?

answered Feb 5 in Chemical education

1 answer 108 views

Calculate the standard heat of formation (in kJ/mol) of water (H2O) given the following bond energies: H-H = 436 kJ/mol, O=O = 498 kJ/mol, H-O = 463 kJ/mol.

asked Feb 3 in Chemical bonding

1 answer 69 views

Calculate the standard enthalpy change for the dissolution of 5.36 g of NaOH in 100.0 mL of water, given that the molar enthalpy of dissolution for NaOH is -44.5 kJ/mol.

asked Feb 3 in Chemical thermodynamics

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