Recent activity by TatianaSteil

1 answer 27 views

What is the complete mechanism of the preparation of 2-chloro-4-nitroaniline from aniline and chlorine gas?

1 answer 32 views

What is the optimum ratio of diisocyanate and polyol required for the synthesis of polyurethane of desired properties and how does the ratio affect the physical and chemical properties of the final product?

answered Feb 22 in Chemical synthesis

1 answer 27 views

What is the standard enthalpy change for the fusion reaction of hydrogen atoms to form helium atoms? Give the equation for the reaction and show all calculations involved in determining the answer.

asked Feb 20 in Chemical thermodynamics

1 answer 34 views

What is the enthalpy of combustion of ethanol (C2H5OH) if the standard enthalpy change of combustion of ethanol is -1367 kJ/mol and the heat of formation of water (H2O) is -285.8 kJ/mol?

asked Feb 20 in ThermoChemistry

1 answer 30 views

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

asked Feb 19 in Coordination Chemistry

1 answer 32 views

How does surface modification of polymers affect their adhesion properties with other materials and what are the underlying chemical factors responsible for this change?

answered Feb 17 in Surface Chemistry

1 answer 30 views

What is the effect of surface chemistry on emulsification in food and beverage processing, and how can it be optimized to improve the stability and consistency of emulsions?

asked Feb 17 in Surface Chemistry

1 answer 34 views

What is the boiling point trend of primary, secondary, and tertiary amines in comparison to their respective alkanes with the same molecular weight? Provide an explanation for the observed trend using intermolecular forces.

answered Feb 14 in Organic Chemistry

1 answer 74 views

How can the swelling capacity of a polymer-based superabsorbent material be optimized for efficient liquid absorption?

asked Feb 11 in Polymer Chemistry

1 answer 36 views

How can molecular docking studies help in identifying potential lead compounds for drug discovery targeting a specific biological target?

asked Feb 5 in Computational Chemistry

1 answer 41 views

Here's a precise problem for the student to solve in Balancing Chemical Equations:Balance the chemical equation for the reaction between iron (III) oxide and carbon monoxide to produce iron and carbon dioxide gas:Fe2O3(s) + CO(g) → Fe(s) + CO2(g)

asked Feb 4 in Chemical reactions

1 answer 69 views

Calculate the standard enthalpy change for the vaporization reaction of 25.0 g of water at its boiling point of 100°C using the following information: the molar heat of vaporization of water is 40.7 kJ/mol and the molar mass of water is 18.015 g/mol.

answered Feb 3 in Chemical thermodynamics

1 answer 85 views

How does changing the ligands of a coordination compound affect its photochemical properties? Provide three specific examples with explanations.

answered Feb 3 in PhotoChemistry

1 answer 80 views

How do changes in pH affect the structure and function of proteins? Provide 3 examples of how a change in pH can impact protein structure and function.

asked Jan 31 in BioChemistry

1 answer 40 views

What is the effect of temperature on the rate of a gas-phase reaction, AB → A + B, using Monte Carlo simulations and considering the collision energy of the reactants?

asked Jan 31 in Computational Chemistry

1 answer 72 views

Calculate the enthalpy change for the combustion of 5.67 grams of methane (CH4) if the standard enthalpy of combustion of methane is -890.4 kJ/mol.

answered Jan 23 in Chemical reactions

1 answer 65 views

Calculate the change in enthalpy (ΔH) for the following reaction at 25°C given the standard enthalpies of formation for each compound: 2H2(g) + O2(g) → 2H2O(g) Standard enthalpies of formation: ΔHf° (H2O)(g) = -241.82 kJ/molΔHf° (H2)(g) = 0 kJ/molΔHf° (O2)(g) = 0 kJ/mol

asked Jan 23 in Physical Chemistry

1 answer 83 views

A student wants to electroplate a piece of copper with silver in an electrochemical cell. If a current of 0.5 A is passed through the cell for 30 minutes, what mass of silver will be deposited on the copper piece? The atomic mass of silver is 107.87 g/mol and the faraday constant is 96,485 C/mol.

asked Jan 22 in ElectroChemistry

1 answer 43 views

A student carried out a chemical reaction in the laboratory and obtained 12 grams of the product. However, the theoretical yield of the product was 15 grams. Calculate the percent yield of the product.

answered Jan 22 in Chemical reactions

1 answer 57 views

What is the Pareto principle?

asked Jan 20 in Psychology

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