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How can we control and optimize the fluorescence properties of quantum dots through photochemical processes?

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

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What is the enthalpy change of dissolving 5 grams of sodium hydroxide (NaOH) in 100 mL of water? The molar enthalpy of dissolution of NaOH is -44.51 kJ/mol.

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

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What is the maximum yield of benzocaine that can be obtained from the reaction between p-aminobenzoic acid and ethanol, assuming 100% conversion of the reactants and a starting mass of 5 grams of p-aminobenzoic acid with excess ethanol?

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

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What is the standard enthalpy change for the reaction N2(g) + 3H2(g) → 2NH3(g) at 298 K, given that the standard enthalpies of formation of nitrogen dioxide, water and ammonia are 82.05 kJ/mol, -285.83 kJ/mol and -46.19 kJ/mol, respectively?

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

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What is the Gibbs free energy change of a spontaneous electrochemical reaction where zinc metal electrode is used as an anode and copper metal electrode is used as a cathode, with a cell potential of 1.10 V?

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

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Identify the major product formed from the following organic reaction: CH3CH2CH2-Br + KOH → Explain the mechanism of the reaction and predict the product based on the principles of rearrangement reactions in organic chemistry.

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

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What is the Gibbs free energy change for the electrochemical reduction of 1 mol of Au3+ to Au in a standard electrochemical cell with a cell potential of 1.42 V at 298 K?

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

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What is the Gibbs free energy change for the electrochemical reaction when a copper electrode is placed in a 1 M copper(II) sulfate solution and a standard hydrogen electrode (SHE) is placed in a 1 M hydrogen ion solution at 25°C?

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

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What is the yield of 2,4-dichlorobenzoic acid that can be obtained from the reaction between 100 grams of benzoic acid and 50 grams of chlorine gas, assuming an 80% yield for the reaction?

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

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What is the pH of a 0.1 M solution of hydrochloric acid (HCl) measured using a pH meter at 25°C?

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

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What is the pH of a 0.1 M solution of hydrochloric acid (HCl) at 25°C using a pH meter?

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

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What is the yield of 2,4,6-trinitrotoluene that can be obtained if 500 mL of toluene is mixed with 700 mL of nitric acid (concentration 65%) and the reaction is carried out for 2 hours at a temperature of 60°C?

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

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What is the fundamental vibrational frequency and corresponding infrared spectrum of the water molecule (H2O) in its ground state?

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

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What is the enthalpy change for the combustion of one mole of methane (CH4) gas to form carbon dioxide (CO2) gas and water (H2O) vapor at standard temperature and pressure (STP)?

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

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What is the standard enthalpy change for the fusion reaction of 2.5 grams of ice at 0 degrees Celsius?

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

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What is the enthalpy of vaporization of water if 50.0 g of water at 100°C is converted to steam at 100°C? The heat capacity of water is 4.184 J/g°C and the molar heat of vaporization of water is 40.7 kJ/mol.

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

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What is the corrosion potential of a stainless steel (SS316) electrode in a 0.1 M sodium chloride (NaCl) solution at 25°C if the pH of the solution is 7.2? The standard reduction potential of SS316 is -0.71 V vs. a standard hydrogen electrode (SHE).

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

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What is the standard enthalpy change when 5 grams of sodium chloride (NaCl) dissolves in 100 mL of water at a temperature of 25°C?

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

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What is the amount of heat released when 2.5 grams of ethanol (C2H5OH) burns completely in excess oxygen, given that the heat of combustion of ethanol is -1371 kJ/mol and the molar mass of ethanol is 46.07 g/mol?

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

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How can we analyze the molecular structure and behavior of liquid crystals to enhance the performance and efficiency of display technology?

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

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