Recent activity by Katja04J6453

1 answer 34 views

What is the purity of an unknown substance if its melting point range is between 125°C to 130°C, and the literature value for the melting point of the pure substance is 132°C?

asked 6 days ago in Analytical Chemistry

1 answer 28 views

How does the presence of DNA lesions affect the accuracy of DNA replication, and what mechanisms have evolved to detect and repair these lesions?

answered 6 days ago in BioChemistry

1 answer 20 views

What is the predicted geometry and polarity of the inorganic molecule SO3?

asked 6 days ago in Inorganic Chemistry

1 answer 28 views

How do the photochemical properties of photosensitive materials used in photography affect the quality and durability of the final photographic image?

asked 6 days ago in PhotoChemistry

1 answer 28 views

What is the impact of pH on the surface charge of a biomembrane and how does this affect the interaction of the biomembrane with other molecules?

asked 6 days ago in Surface Chemistry

1 answer 22 views

How does the molecular structure of conductive polymers affect their electrical conductivity and mechanical flexibility, and how can these materials be optimized for use in flexible electronics with superior performance and durability?

asked Feb 21 in Materials Chemistry

1 answer 31 views

What is the major product formed when 1-bromo-2-methylcyclohexane undergoes an E2 elimination reaction in the presence of a strong base? Include the complete mechanism of the reaction and explain the reason for the stereochemistry of the product.

asked Feb 20 in Organic Chemistry

1 answer 31 views

What is the effect of varying reactant concentrations on the reaction rate and efficiency in the chemical reaction between hydrochloric acid and sodium thiosulfate, and how can this be explained using the collision theory?

answered Feb 20 in Chemical kinetics

1 answer 29 views

What is the bond strength of a water molecule and how can it be predicted using molecular orbital theory?

asked Feb 18 in Chemical bonding

1 answer 26 views

What is the balanced chemical equation for the synthesis reaction between magnesium and oxygen to form magnesium oxide?

answered Feb 17 in Chemical reactions

1 answer 17 views

How does the addition of a catalyst affect the equilibrium position of a chemical reaction? Provide a detailed explanation with an example.

asked Feb 17 in Chemical equilibrium

1 answer 25 views

What are the effects of surface chemistry on the quality and safety of processed foods and beverages during storage?

asked Feb 14 in Surface Chemistry

1 answer 26 views

How does the process of RNA transcription and translation contribute to the synthesis of proteins in living organisms, and what are the specific chemical reactions involved in this process?

asked Feb 14 in BioChemistry

1 answer 29 views

How can the synthesis of quantum dots be optimized to achieve greater control over their size, composition and surface chemistry for a particular application?

asked Feb 14 in Materials Chemistry

1 answer 32 views

Suppose you are given two molecules, molecule A with a single bond and molecule B with a triple bond. Using your knowledge of chemical bonding, predict which molecule will have a higher bond strength and explain why.

asked Feb 13 in Chemical bonding

1 answer 42 views

How can the sensitivity and selectivity of a polymer-based sensor be improved in order to detect specific molecules in complex mixtures?

asked Feb 10 in Polymer Chemistry

1 answer 30 views

How can the efficiency of the polymerization process be improved for the production of high-quality polymers with desirable properties?

asked Feb 7 in Chemical engineering

1 answer 28 views

How can the design of a production system for surfactants be optimized to maximize yield while minimizing production costs and environmental impact?

asked Feb 7 in Chemical engineering

1 answer 41 views

Calculate the standard enthalpy change for the reaction between calcium oxide (CaO) and water (H2O) to form calcium hydroxide (Ca(OH)2), given that all species are in their standard state and that the balanced chemical equation is:CaO(s) + H2O(l) → Ca(OH)2(s)The standard enthalpies of formation of CaO(s), H2O(l) and Ca(OH)2(s) are -635.1 kJ/mol, -285.8 kJ/mol, and -986.2 kJ/mol respectively.

asked Feb 3 in Chemical thermodynamics

1 answer 39 views

How does changing the concentration of reactants or products affect the rate of a reaction at equilibrium?

asked Feb 3 in Chemical kinetics

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