Answers by HoraceT7712

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What is the mechanism of the reaction of aniline and nitric acid to form p-nitroaniline and what is the role of sulfuric acid in the reaction?

answered 3 days ago in Chemical synthesis

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20 views

How does the reaction rate affect the selectivity of the reaction between FeCl3 and KCNS in terms of the color change observed, as measured by UV-Vis spectroscopy?

answered 3 days ago in Chemical kinetics

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25 views

What is the optimum reaction conditions (temperature and time) for the preparation of 2-chloro-4-nitroaniline from aniline and chlorine gas while maintaining high yield and purity?

answered 3 days ago in Chemical synthesis

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23 views

How can the use of polymer-based drug delivery systems be optimized to achieve targeted and sustained drug release for the treatment of a specific disease or condition?

answered 4 days ago in Polymer Chemistry

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23 views

What are the photochemical properties of the most commonly used photovoltaic materials and how do these properties affect the efficiency of the solar cells they are used in?

answered 4 days ago in PhotoChemistry

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29 views

What is the bond dissociation energy of a methane molecule (CH4) in kilojoules per mole, assuming that all the bonds are broken simultaneously and the products are isolated atoms?

answered Feb 18 in Chemical bonding

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33 views

How can we synthesize the molecule 4-ethyl-2-methylhexane using retrosynthetic analysis? Show the steps involved in the retrosynthesis and propose a viable synthetic pathway.

answered Feb 14 in Organic Chemistry

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34 views

How can we optimize the synthesis and characterization process of new materials for use in fuel cells to improve their efficiency and prolong their lifespan?

answered Feb 14 in Materials Chemistry

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26 views

How do metal ions coordinate and catalyze reactions in metalloproteins and enzymes?

answered Feb 13 in Coordination Chemistry

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41 views

How many geometric isomers are possible for the coordination compound [Co(NH3)4Cl2]+?

answered Feb 13 in Coordination Chemistry

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35 views

What are the effects of doping on the electrical and optical properties of semiconductors, and how does the dopant concentration affect these properties?

answered Feb 12 in Materials Chemistry

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38 views

How can the chemical structures and properties of natural compounds be modified and optimized to develop new treatments for inflammatory diseases such as rheumatoid arthritis?

answered Feb 6 in Medicinal Chemistry

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56 views

Calculate the standard enthalpy and entropy change for the reaction, given the following information:2 H2(g) + O2(g) → 2 H2O(g)∆H°f [H2O(g)] = -241.8 kJ/mol∆H°f [H2(g)] = 0 kJ/mol∆H°f [O2(g)] = 0 kJ/mol∆S° [H2O(g)] = 188.8 J/Kmol∆S° [H2(g)] = 130.7 J/Kmol∆S° [O2(g)] = 205.2 J/KmolAssuming that all heat capacities are independent of temperature, calculate ∆S°rxn and ∆H°rxn for this reaction.

answered Feb 3 in Inorganic Chemistry

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54 views

Calculate the overpotential of an electrochemical cell where Zinc metal is used as an anode and Copper metal as a cathode. The concentration of Zinc ions in the half-cell is 1 M and Copper ions in the half-cell is 0.1 M. The temperature of the system is 25°C. (Given: Standard Reduction Potentials - Zn²⁺ + 2e⁻ → Zn(s) = -0.76 V and Cu²⁺ + 2e⁻ → Cu(s) = +0.34 V)

answered Feb 3 in ElectroChemistry

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77 views

How can we increase students' exposure to chemistry in their everyday lives, and what strategies can be taken to make chemistry more relevant and engaging to them?

answered Jan 30 in Chemical education

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65 views

Calculate the enthalpy change of the following chemical reaction: 2H2 + O2 → 2H2O Given: - ΔHf°(H2O) = -286 kJ/mol - ΔHf°(H2) = 0 kJ/mol - ΔHf°(O2) = 0 kJ/mol

answered Jan 23 in Chemical reactions

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68 views

A student needs to calculate the Faraday constant for the reduction of copper ions in a solution using a current of 2.5 amperes for 5 minutes. If the mass of copper deposited on the cathode was 0.3 grams, what is the value of the Faraday constant?

answered Jan 22 in ElectroChemistry

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57 views

A 1.00 gram sample of sucrose (C12H22O11) is completely hydrolyzed in solution with excess HCl. If the solution is cooled to room temperature, what is the change in enthalpy ($\Delta H$) for the reaction? The heat capacity of the solution is 4.18 J/(g*K) and the temperature change is -10°C.

answered Jan 22 in ThermoChemistry

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30 views

What is a phoneme?

answered Jan 20 in Psychology

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83 views

How does the biological theory explain human behaviour?

answered Jan 20 in Psychology

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