Recent activity by ArlenBieber1

1 answer 33 views

What is the effect of alloy composition and microstructure on the mechanical properties (such as tensile strength and ductility) of aluminum-copper alloys designed for use in aerospace applications?

asked Feb 20 in Materials Chemistry

1 answer 35 views

How does the critical temperature of a superconducting material depend on the chemical composition and crystal structure of the material, and how can this information be used to design and optimize superconducting materials for practical applications?

asked Feb 19 in Materials Chemistry

1 answer 46 views

How does the carbon footprint of a typical individual in the United States compare to that of an individual in a developing country, and what are the environmental implications of these differences?

asked Feb 18 in Environmental Chemistry

1 answer 32 views

What is the bond dissociation energy of methane (CH4)? Use the given bond energies: C-H bond energy = 413 kJ/mol and C-C bond energy = 348 kJ/mol.

answered Feb 18 in Chemical bonding

1 answer 43 views

What is the boiling point of magnesium oxide (MgO) at a pressure of 1 atm? Show the calculation steps and provide the answer in degrees Celsius.

answered Feb 17 in Inorganic Chemistry

1 answer 34 views

How can the yield and purity of the surfactant in the production of detergents be optimized through the choice of appropriate reaction conditions, such as temperature and pressure, and catalyst selection?

asked Feb 14 in Chemical engineering

1 answer 73 views

What is the number of electrons transferred in a reaction where 2 moles of aluminum are oxidized and 3 moles of copper (II) ions are reduced in an electrolytic cell?

asked Feb 13 in ElectroChemistry

1 answer 40 views

What is the oxidation state of nitrogen in the compound NH4+?

asked Feb 13 in Chemical reactions

1 answer 62 views

What is the hybridization of the nitrogen atom in the compound NH3?

answered Feb 13 in Inorganic Chemistry

1 answer 52 views

What type of intermolecular forces are present in a liquid sample of ethanol?

answered Feb 13 in Chemical bonding

1 answer 29 views

How does the photochemical activity of enantiomers differ from each other and what is the significance of this difference in terms of their biological activity and experimental applications in fields such as pharmacology and material science?

answered Feb 13 in PhotoChemistry

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?

answered Feb 12 in Environmental Chemistry

1 answer 34 views

How can metabolomics and systems biology be used to determine the effect of a specific drug on the metabolic pathways of a cell?

answered Feb 5 in BioChemistry

1 answer 40 views

How can computational methods be utilized to predict and optimize the adsorption properties of metal-organic frameworks for the efficient removal of carbon dioxide from flue gas?

asked Feb 5 in Computational Chemistry

1 answer 81 views

Calculate the ΔHrxn for the combustion of methane gas (CH4) if the enthalpies of formation for methane, carbon dioxide, and water are -74.8, -393.5, and -285.8 kJ/mol respectively, using Hess's Law.

asked Feb 3 in Chemical reactions

1 answer 69 views

Calculate the standard enthalpy change for the sublimation of iodine solid to iodine gas at 298 K with the following given data: - Standard enthalpy of fusion of iodine: 15.52 kJ/mol- Standard molar entropy of iodine solid: 62.7 J/K/mol- Standard molar entropy of iodine gas: 260.6 J/K/mol

asked Feb 3 in Chemical thermodynamics

1 answer 96 views

Calculate the standard enthalpy change for the reaction in which 50.0 mL of 1.0 M HCl is mixed with 50.0 mL of 1.0 M NaOH in a constant pressure calorimeter using the following data: the temperature of the HCl and NaOH solutions are both initially 25.0 °C, and the temperature of the mixture increases to 32.0 °C. The specific heat of the solution is 4.18 J/(g·°C) and the density of the solution is 1.00 g/mL. The reaction is: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

asked Feb 3 in Chemical thermodynamics

1 answer 92 views

What is the role of AMP-activated protein kinase (AMPK) in regulating glucose metabolism during exercise?

answered Jan 31 in BioChemistry

1 answer 110 views

How can we increase awareness and importance of environmental chemistry in chemistry education programs to encourage students to consider the impact of chemistry on the environment?

asked Jan 30 in Chemical education

1 answer 85 views

A student needs to determine the diffusion coefficient of a gas in a liquid by measuring the rate of diffusion using a diffusion cell. If the student knows the initial concentration and final concentration of the gas in the cell, and the time it took for diffusion to occur, what is the diffusion coefficient of the gas in the liquid?

answered Jan 22 in Physical Chemistry

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