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What is the lattice energy of NaCl(s) at 25°C given that the enthalpy of formation of NaCl(s) is -411.2 kJ/mol, the enthalpy of sublimation of Na(s) is 107.29 kJ/mol, and the first ionization energy of Na(g) is 495.8 kJ/mol?

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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What is the corrosion rate of iron in a 0.1 M HCl (hydrochloric acid) solution at room temperature (25°C) if it loses 5 grams of mass after being immersed in the solution for 2 hours?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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What is the entropy change (ΔS) for the reaction of burning 2 moles of methane gas (CH4) in excess oxygen gas (O2) at standard conditions? The balanced chemical equation for this reaction is:CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the vibrational frequency of HCl molecule in its ground state?

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

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What is the anodic Tafel slope for the oxidation of zinc in a solution of 0.5 M NaCl at 25°C with a current density of 5 mA/cm2? The exchange current density value for the reaction is 2.5 x 10^-6 A/cm2.

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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How many structural isomers are possible for the coordination compound [Co(en)2Cl2]+, where en is ethylenediamine? Also, draw the structures of all the possible isomers.

asked Mar 1 in Coordination Chemistry by TheScientist (138k points)

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What is the corrosion potential of iron in a 0.1 M solution of sulfuric acid at 25°C? Use the standard electrode potential values of Fe2+ and Fe3+ and the Nernst equation to calculate the potential value.

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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What is the enthalpy of solution of 5 grams of ammonium nitrate in 100 grams of water at room temperature? Given the molar heat of solution for ammonium nitrate is -25.7 kJ/mol.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What are the factors that affect the rate of corrosion on a metal surface and how can passivation be used to prevent it? Provide an example of a metal that is commonly passivated to protect it from corrosion.

asked Mar 1 in Surface Chemistry by TheScientist (138k points)

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What is the amount of heat released when 2.5 moles of propane (C3H8) is completely burned in oxygen gas (O2) according to the balanced equation: C3H8 + 5O2 → 3CO2 + 4H2O given that the standard enthalpy of combustion of propane is -2220 kJ/mol?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What are the factors that affect the phosphorescent properties of materials used in organic light-emitting devices (OLEDs)?

asked Mar 1 in PhotoChemistry by TheScientist (138k points)

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What methods can be used to reduce the environmental impact of industrial waste disposal, and how do these methods compare in terms of effectiveness and feasibility in different industries and geographic locations?

asked Mar 1 in Environmental Chemistry by TheScientist (138k points)

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How can we effectively remove persistent organic pollutants (POPs) from contaminated soil and water sources for the purpose of environmental cleanup and protection?

asked Mar 1 in Environmental Chemistry by TheScientist (138k points)

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What is the amount of energy required to break the carbon-hydrogen bond in a methane molecule (CH4) if the bond dissociation energy (BDE) of C-H is 413 kJ/mol?

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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What is the change in entropy when 2 moles of H2 (g) react with 1 mole of O2 (g) to form 2 moles of H2O (l) at a constant temperature of 298 K? (Assume standard molar entropy values for the reactants and products)

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the activation energy of the following chemical reaction: 2H2O2(aq) → 2H2O(l) + O2(g)? Use the experimental data provided to calculate the activation energy in Joules per mole.

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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What are the factors affecting the photochemical properties of quantum dots and how can we optimize their performance for various applications in electronics, photonics, and biomedicine?

asked Mar 1 in PhotoChemistry by TheScientist (138k points)

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What are the different methods for synthesizing carboxylic acids and how do they differ in terms of efficiency, yield and cost?

asked Mar 1 in Organic Chemistry by TheScientist (138k points)

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What is the standard enthalpy change for the reaction that occurs when 50 ml of 0.1 M HCl is mixed with 50 ml of 0.1 M NaOH at 25°C? The equation for the reaction is: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l).

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the value of the reaction quotient Q for the following chemical reaction at a temperature of 25°C, given the concentrations of reactants and products: 2H2(g) + O2(g) → 2H2O(g) [H2] = 0.25 M [O2] = 0.15 M [H2O] = 0.20 M

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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