Recent activity by HiramFarrell

1 answer 78 views

How does the release of heavy metals from an industrial project, such as a mining operation, impact the water quality of nearby rivers and lakes?

asked Feb 24 in Environmental Chemistry

1 answer 71 views

How does the presence of a metal ion in metalloenzymes and metalloproteins affect their function and how can this knowledge be applied in developing new drugs for specific diseases?

asked Feb 22 in Coordination Chemistry

1 answer 68 views

How do the photochemical properties of various materials used in photovoltaic cells affect their efficiency in converting light into electrical energy?

asked Feb 22 in PhotoChemistry

1 answer 82 views

What is the optimal ratio of toluene to nitric acid to obtain the highest yield of 2,4,6-trinitrotoluene during the preparation process?

asked Feb 21 in Chemical synthesis

1 answer 130 views

What is the effect of changing the ratio of monomers in a polymer-based biomaterial on its mechanical properties for tissue engineering applications?

asked Feb 20 in Polymer Chemistry

1 answer 84 views

What is the electronegativity difference between a nitrogen atom and a chlorine atom in the molecule HCl?

asked Feb 20 in Chemical bonding

1 answer 77 views

What is the effect of pH on the rate of the photochemical reaction of methylene blue with hydrogen peroxide in aqueous solution under UV light?

answered Feb 19 in PhotoChemistry

1 answer 79 views

What is the coordination number and geometry of [Fe(H2O)6]2+ complex ion using UV-Vis spectroscopy?

answered Feb 19 in Coordination Chemistry

1 answer 78 views

What is the complete combustion formula of propane (C3H8) and what products are produced during the reaction?

asked Feb 18 in Chemical reactions

1 answer 81 views

How does the chemical structure of a drug affect its pharmacodynamics in the body? Provide examples of different drug classes and their mechanisms of action.

answered Feb 18 in Medicinal Chemistry

1 answer 86 views

What is the bond enthalpy of the H-H bond in the H2 molecule?

answered Feb 18 in Chemical bonding

1 answer 74 views

How does the addition of a catalyst (such as catalase) affect the rate of decomposition of hydrogen peroxide?

answered Feb 17 in Chemical kinetics

1 answer 87 views

How does surface chemistry influence the stability and shelf life of emulsions used in the production of food and beverage products, and how can this knowledge be applied to optimize emulsion formulations in the industry?

asked Feb 14 in Surface Chemistry

1 answer 79 views

How does the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) in plants discriminate between carbon dioxide and oxygen during photosynthesis?

asked Feb 14 in BioChemistry

1 answer 82 views

How can the efficiency of polymer electrolyte-based batteries be improved?

answered Feb 7 in Polymer Chemistry

1 answer 78 views

How can chemistry teachers provide better support and accommodations for students with learning disabilities to help them succeed in their chemistry coursework?

answered Feb 5 in Chemical education

1 answer 173 views

What is the effect of changing the size and shape of quantum dots and quantum wells on their electronic and optical properties, and how can these changes be calculated using quantum chemistry methods?

answered Feb 3 in Quantum Chemistry

1 answer 71 views

Calculate the Gibbs free energy change (ΔG) for the reaction:N2(g) + 3H2(g) ⇌ 2NH3(g)Given the standard Gibbs free energy of formation (ΔG°f) values at 298 K are:ΔG°f of NH3(g) = -16.6 kJ/molΔG°f of N2(g) = 0 kJ/molΔG°f of H2(g) = 0 kJ/molAssume ideal gas behavior for all gases involved in the reaction.

asked Jan 23 in Chemical thermodynamics

1 answer 82 views

Calculate the enthalpy change of combustion for the reaction of methane (CH4) when 1.25 moles of methane is completely burnt in excess oxygen gas at standard conditions, given that the enthalpy change of combustion for methane is -890.3 kJ/mol.

asked Jan 23 in ThermoChemistry

1 answer 78 views

Calculate the enthalpy change for the reaction of burning 1 mole of methane using Hess's Law, given the following information:1) Enthalpy of formation for methane = -74.8 kJ/mol2) Enthalpy of combustion for methane = -890.3 kJ/mol3) Enthalpy of formation for water = -285.8 kJ/mol4) Enthalpy of formation for carbon dioxide = -393.5 kJ/mol

asked Jan 23 in ThermoChemistry

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