Recent activity by MarcellaMack

1 answer 19 views

How does the protein structure of lysozyme change over time during molecular dynamics simulations under different environmental conditions and why?

asked 3 days ago in Computational Chemistry

1 answer 12 views

What is the optimal reaction conditions, including temperature, pressure, and catalyst, required for the efficient synthesis of polyvinyl chloride from vinyl chloride monomer?

answered 3 days ago in Chemical synthesis

1 answer 22 views

What is the effect of varying the molecular weight and degree of branching on the mechanical properties of a polymer and how does this relate to potential biomedical applications?

answered 4 days ago in Materials Chemistry

1 answer 5 views

What is the effect of different cations and anions on the viscosity of ionic liquids at varying temperatures?

asked 5 days ago in Physical Chemistry

1 answer 30 views

What is the coordination number of the europium ion in the complex [Eu(H2O)9]3+ ? How many unpaired electrons are present in the europium ion in this complex and what is its magnetic moment?

answered 6 days ago in Coordination Chemistry

1 answer 33 views

Identify the type of inorganic solid that forms from the combination of Mg and Cl atoms.

answered 6 days ago in Inorganic Chemistry

1 answer 32 views

How does surface modification of biomaterials affect their biocompatibility and cellular adhesion?

answered Feb 17 in Surface Chemistry

1 answer 38 views

What type of bond is formed between two carbon atoms in a molecule of ethane (C2H6) and how is it determined?

asked Feb 13 in Chemical bonding

1 answer 10 views

How can we design a drug to selectively target and kill only breast cancer cells without harming healthy cells, using the principles of medicinal chemistry?

asked Feb 12 in Medicinal Chemistry

1 answer 49 views

How can the synthesis method and characterization techniques be optimized to produce a new material for use in a gas sensor with improved selectivity and sensitivity towards a specific gas?

asked Feb 11 in Materials Chemistry

1 answer 39 views

How can the presence of heavy metals such as lead and mercury be detected and quantified in soil and water samples using analytical chemistry techniques, and what are the potential risks and impacts of these contaminants on human health and the environment?

answered Feb 10 in Environmental Chemistry

1 answer 30 views

How can the physical and chemical properties of polymers be optimized to improve the efficacy and delivery of drugs in polymer-based drug delivery systems?

asked Feb 10 in Polymer Chemistry

1 answer 9 views

How can the design of a hydrogen fuel production system be optimized to increase efficiency and reduce environmental impact in chemical engineering?

asked Feb 6 in Chemical engineering

1 answer 33 views

How can chemistry students in low-resource areas access quality textbooks and resources to enhance their understanding of complex topics?

answered Feb 5 in Chemical education

1 answer 28 views

Calculate the standard entropy change for the reaction 2H2(g) + O2(g) → 2H2O(g) given the standard entropy values of H2(g) = 130.6 J/mol K, O2(g) = 205.0 J/mol K, and H2O(g) = 188.8 J/mol K. Also, determine whether the reaction is spontaneous or not at 298 K.

answered Feb 3 in Inorganic Chemistry

1 answer 43 views

Calculate the standard enthalpy change for the vaporization of 15 grams of water at its boiling point, given that the molar enthalpy of vaporization of water is 40.7 kJ/mol.

asked Feb 3 in Chemical thermodynamics

1 answer 49 views

Calculate the standard enthalpy change for the following reaction involving liquids at 298 K: C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)Given the standard enthalpies of formation of C2H5OH(l), CO2(g) and H2O(l) are −277.6 kJ/mol, −393.5 kJ/mol and −285.8 kJ/mol respectively.

answered Feb 3 in Chemical thermodynamics

1 answer 45 views

Calculate the pH of a 0.1 M solution of hydrochloric acid assuming complete dissociation. The acid dissociation constant (Ka) for HCl is 1.3 × 10^-6 at 25°C.

asked Feb 3 in Chemical reactions

1 answer 66 views

What is the difference in reactivity between aliphatic and aromatic compounds when subjected to a nucleophilic substitution reaction? Provide specific examples of each type of compound and their expected reactions.

answered Jan 31 in Organic Chemistry

1 answer 80 views

How does acid mine drainage affect the pH level and metal concentrations of nearby bodies of water and what chemical processes are involved in this phenomenon?

asked Jan 30 in Environmental Chemistry

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