Recent activity by AnnetteYbc3

1 answer 27 views

How does the size and shape of nanomaterials affect their catalytic activity in a specific chemical reaction?

1 answer 36 views

How does the monomer structure affect the properties of the polymer produced in the polymerization reaction?

asked Feb 21 in Organic Chemistry

1 answer 25 views

How does the framework topology of a zeolite affect its catalytic properties for the cracking of long-chain alkanes? Use computational methods to analyze and compare the catalytic activity of two different zeolites with different framework topologies.

answered Feb 20 in Computational Chemistry

1 answer 32 views

What is the formal charge on the nitrogen atom in the compound NH4+?

asked Feb 20 in Chemical bonding

1 answer 32 views

What is the effect of the anion type on the viscosity of different ionic liquids at varying temperatures and pressure?

answered Feb 20 in Physical Chemistry

1 answer 28 views

How does the coordination chemistry of metalloproteins and enzymes impact the activity and function of zinc-containing enzymes?

answered Feb 19 in Coordination Chemistry

1 answer 34 views

How does the surface modification of biomaterials affect their biocompatibility and adhesion to cells?

asked Feb 17 in Surface Chemistry

1 answer 32 views

How does surface chemistry of corrosion and passivation affect the durability of metallic objects exposed to different corrosive environments over time?

asked Feb 14 in Surface Chemistry

1 answer 28 views

What are the steps involved in designing a drug that specifically targets an enzyme or receptor, and how can these steps be optimized to produce a more effective drug with fewer side effects?

asked Feb 12 in Medicinal Chemistry

1 answer 79 views

How can the properties of polymer-based superabsorbent materials be tailored for specific applications, such as in the agriculture industry for water retention in soil?

answered Feb 10 in Polymer Chemistry

1 answer 104 views

How can the process for the production of polyethylene terephthalate (PET) be optimized for higher yield and purity while minimizing waste and energy consumption?

answered Feb 10 in Chemical engineering

1 answer 43 views

How can the mechanical and physical properties of a polymer be optimized for 3D printing applications?

answered Feb 7 in Materials Chemistry

1 answer 37 views

How can knowledge of chemical reactions be applied to understand the process behind rust formation on iron objects, and suggest a method to prevent rusting?

asked Feb 5 in Chemical education

1 answer 68 views

Calculate the standard enthalpy change for the reaction of [Co(H2O)6]Cl2 and NaOH using the following balanced chemical equation and given standard enthalpies of formation:[Co(H2O)6]Cl2 (aq) + 2NaOH (aq) → [Co(H2O)6](OH)2 (s) + 2NaCl (aq)ΔH°f [Co(H2O)6]Cl2 (aq) = -415.32 kJ/molΔH°f [Co(H2O)6](OH)2 (s) = -1276.24 kJ/molΔH°f NaCl (aq) = -407.33 kJ/mol

asked Feb 3 in Chemical thermodynamics

1 answer 51 views

Calculate the standard enthalpy change for the complete combustion of methane (CH4) at constant pressure and 298 K, given that the standard enthalpies of formation for CH4(g) and H2O(l) are -74.8 kJ/mol and -285.8 kJ/mol, respectively.

answered Feb 3 in Chemical thermodynamics

1 answer 97 views

What is the excitation energy and wavelength of the highest energy absorption transition for a molecule of benzene (C6H6) using time-dependent density functional theory (TDDFT) calculations?

answered Jan 31 in Computational Chemistry

1 answer 55 views

How can Raman spectroscopy be used to identify the presence of specific compounds, such as organic molecules, in a contaminated soil sample?

asked Jan 29 in Analytical Chemistry

1 answer 66 views

Calculate the Gibbs free energy change for the following reaction at 298 K:2CH4(g) + 3O2(g) → 2CO2(g) + 2H2O(g)Given the standard Gibbs free energy of formation at 298 K for CH4(g), O2(g), CO2(g) and H2O(g) are -50.8 kJ/mol, 0 kJ/mol, -394.4 kJ/mol, and -241.8 kJ/mol respectively.

asked Jan 23 in Chemical thermodynamics

1 answer 65 views

Calculate the enthalpy of adsorption for a reaction where 2 moles of nitrogen gas (N2) are adsorbed on the surface of a solid at -100°C. Given that the partial pressure of N2 in the gas phase is 0.2 atm and the equilibrium constant for adsorption of N2 at this temperature is 2.5 x 10^3. Assume the adsorption is a reversible process and that the ideal gas law can be used to calculate partial pressures.

answered Jan 23 in ThermoChemistry

1 answer 82 views

A student needs to calculate the efficiency of a voltaic cell that has a standard potential difference of 0.78 V and produces a current of 2.5 A. The cell is operated for 8 hours and consumes a total of 2400 Coulombs of charge. What is the efficiency of this electrochemical cell?

answered Jan 22 in ElectroChemistry

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