Recent activity by JuliannSfd66

1 answer 32 views

What is the relationship between the molecular weight and the glass transition temperature of a polymer? Provide experimental evidence to support your answer.

asked Feb 24 in Physical Chemistry

1 answer 40 views

What is the effect of varying pH levels on the rate of the reaction between hydrochloric acid (HCl) and magnesium (Mg)?

asked Feb 22 in Chemical kinetics

1 answer 28 views

What is the overpotential for the reduction of copper ions to copper metal at a cathode if the standard potential for the reaction is +0.34 V and the actual potential applied is +0.50 V?

answered Feb 22 in ElectroChemistry

1 answer 33 views

What are the most challenging aspects of understanding the periodic table and chemical elements for high school students, and what strategies can be used to overcome these difficulties?

asked Feb 21 in Chemical education

1 answer 29 views

How does the formation of fatty acid derivatives such as acetyl-CoA, malonyl-CoA, and palmitoyl-CoA impact lipid metabolism and transport in the body?

answered Feb 20 in BioChemistry

1 answer 28 views

What is the effect of different light intensities (low, medium and high) on the rate of photochemical reactions of Chlorophyll pigment present in Spinach leaves?

asked Feb 19 in PhotoChemistry

1 answer 31 views

What is the effect of varying pH on the activity of an enzyme that breaks down biomolecules such as carbohydrates or lipids?

asked Feb 17 in Organic Chemistry

1 answer 34 views

What specific photochemical properties can be observed in supramolecular assemblies composed of porphyrin and fullerenes, and how do these properties differ from those of the individual components?

answered Feb 17 in PhotoChemistry

1 answer 51 views

How does the metal coordination and bonding affect the properties and potential applications of metallofullerenes and metalloclusters?

asked Feb 13 in Coordination Chemistry

1 answer 105 views

How does the crystal field theory explain the color properties of transition metal complexes? Provide an example of a transition metal complex and its corresponding color that can be explained by this theory.

asked Feb 12 in Coordination Chemistry

1 answer 66 views

How can the process for the production of polymers be optimized to reduce the formation of undesirable byproducts while maintaining high yields?

answered Feb 10 in Chemical engineering

1 answer 115 views

Determine the equilibrium constant, Kc, for the reaction between iodine and thiosulfate ions in aqueous solution, given the initial concentrations of iodine (0.02 M), thiosulfate (0.05 M), and hydrogen ions (0.1 M). The reaction is as follows:I2(aq) + 2S2O3^2-(aq) + 2H+(aq) ⇌ 2I^-(aq) + S4O6^2-(aq) Assume that the reaction takes place at 25°C and that the reaction quotient Qc has a value of 0.04 at equilibrium.

answered Feb 4 in Chemical equilibrium

1 answer 57 views

Calculate the standard enthalpy change for the formation of one mole of methane (CH4) gas given the following information: - Heat of combustion of methane gas is -890.36 kJ/mol - Heat of formation of water (H2O) liquid is -285.83 kJ/mol - Heat of formation of carbon dioxide (CO2) gas is -393.52 kJ/mol

answered Feb 3 in Chemical thermodynamics

1 answer 45 views

How does changing the concentration of reactants affect the rate of a chemical reaction and the resulting yield of products?

asked Feb 3 in Chemical kinetics

1 answer 94 views

Calculate the enthalpy of solution for the dissolution of 15g of potassium chloride (KCl) in 100g of water (H2O) given that the temperature change was -12.5°C. The enthalpy of fusion for KCl is 17.2 kJ/mol and the specific heat capacity of water is 4.18 J/g•°C.

asked Jan 23 in ThermoChemistry

1 answer 52 views

Calculate the enthalpy change of dissolving 10.0 g of sodium hydroxide (NaOH) in 200.0 mL of water at 25°C. Given: the enthalpy of dissolution of NaOH is -44.5 kJ/mol.

asked Jan 23 in ThermoChemistry

1 answer 83 views

Calculate the corrosion potential of a copper electrode immersed in a 0.10 M solution of copper(II) sulfate at 25°C, given that the standard reduction potential of Cu2+/Cu is +0.34 V and the pH of the solution is 4.5.

asked Jan 23 in ElectroChemistry

1 answer 65 views

What is the information social influence theory by Muzafer Sherif?

answered Jan 20 in Psychology

1 answer 72 views

When evaluating a theory, what is the criterion for parsimony?

asked Jan 20 in Psychology

1 answer 65 views

What is a possible negative outcome of unresolved conflict?

asked Jan 20 in Psychology

Categories