Recent activity by RandolphNola

1 answer 74 views

What is the relationship between light intensity and the rate of photochemical reactions in the oxidation of iodide ions by hydrogen peroxide in the presence of UV light?

asked Feb 24 in PhotoChemistry

1 answer 79 views

What is the effect of pressure on the reaction rate between nitrogen gas and hydrogen gas to produce ammonia gas at a constant temperature and with a fixed amount of catalyst? How does the reaction rate change as the pressure is varied?

asked Feb 22 in Chemical kinetics

1 answer 79 views

How do the mechanical and thermal properties of polymer nanocomposites change as the particle size and concentration of nanofillers are systematically varied?

answered Feb 20 in Polymer Chemistry

1 answer 89 views

How does the concentration of photosensitizers affect the rate of photochemical reactions?

answered Feb 19 in PhotoChemistry

1 answer 81 views

How does the composition of glass affect its optical properties and how can this understanding be used to develop improved glasses for optical applications?

answered Feb 18 in Materials Chemistry

1 answer 91 views

How does the choice of basis set affect the accuracy of density functional theory calculations of the electronic properties of transition metal compounds?

asked Feb 18 in Computational Chemistry

1 answer 96 views

How does the change in reactant orientation affect the rate of the chemical reaction between magnesium and hydrochloric acid, and how can this be investigated?

asked Feb 18 in Chemical kinetics

1 answer 78 views

What is the bond enthalpy of HCl molecule? Given that the bond energy of H-H is 436 kJ/mol, H-Cl is 431 kJ/mol and Cl-Cl is 242 kJ/mol.

asked Feb 18 in Chemical bonding

1 answer 128 views

How does the composition and structure of lipoproteins affect their role in lipid transport and metabolism in the human body?

asked Feb 13 in BioChemistry

1 answer 126 views

How would increasing the pH of a solution affect the equilibrium position of a weak acid and its conjugate base? Provide a detailed explanation with a relevant chemical equation and the corresponding equilibrium constant expression.

asked Feb 13 in Chemical equilibrium

1 answer 88 views

What is the oxidation state of sulfur in the compound H2SO4 (sulfuric acid), and what is its change in oxidation state during the reaction as it is reduced to H2S (hydrogen sulfide) in a redox reaction with hydrogen gas?

answered Feb 13 in Chemical reactions

1 answer 100 views

How can we control the molecular weight and branching of polymers during a polymerization reaction using different types of initiators and monomers?

answered Feb 12 in Organic Chemistry

1 answer 87 views

How can the efficiency of polymer-based photovoltaic materials be improved through chemical modifications to the polymer structure?

answered Feb 7 in Polymer Chemistry

1 answer 83 views

Calculate the standard enthalpy change for the formation of ethylene oxide (C2H4O) given the following reaction:C2H4(g) + 1.5 O2(g) -> C2H4O(g)Given the standard enthalpy of formation of C2H4(g) = 52.5 kJ/mol and that of O2(g) = 0 kJ/mol, determine the standard enthalpy of formation of C2H4O(g).

answered Feb 3 in Chemical thermodynamics

1 answer 76 views

How can the chemical engineering principles be applied to design a cost-effective and efficient system for the production of natural flavors?

answered Jan 31 in Chemical engineering

1 answer 161 views

How can a chemistry student improve their understanding of complex chemical concepts?

asked Jan 30 in Chemical education

1 answer 78 views

How can the concentration of a certain metal ion be determined in a given water sample using voltammetry, and what is the sensitivity and limit of detection of the voltammetric method used?

answered Jan 29 in Analytical Chemistry

1 answer 76 views

Calculate the Gibbs free energy change for the electrochemical reaction where zinc metal (Zn) is oxidized by aqueous hydrogen ions (H+) to form aqueous zinc ions (Zn2+) and hydrogen gas (H2) at 298 K, given that the standard reduction potential of Zn2+/Zn is -0.76 V and the standard hydrogen electrode potential is 0 V.

asked Jan 23 in ElectroChemistry

1 answer 103 views

Calculate the bond dissociation energy of a molecule of hydrogen (H₂) given that the bond length is 74 pm and the energy required to break the bond is 436 kJ/mol.

answered Jan 23 in Chemical bonding

1 answer 168 views

A student prepared a 0.2 M solution of sodium acetate and the equilibrium reaction for sodium acetate is CH3COO- + H2O ⇌ CH3COOH + OH-. The initial pH of the solution is 9. Calculate the new pH of the solution when 0.1 mol of NaOH is added to it.

asked Jan 22 in Chemical equilibrium

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