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What is the theoretical yield of aspirin that can be obtained from the synthesis of 5 grams of salicylic acid and excess acetic anhydride?

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

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What is the standard enthalpy change for the reaction of calcium oxide (solid) and water to form calcium hydroxide (solid) if 3.2 grams of calcium oxide reacts with excess water under standard conditions?

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

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What is the molar mass of Calcium Carbonate (CaCO₃)? Show your calculations.

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

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What is the formal charge of the chlorine atom in the molecule ClO2? Show your calculations.

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

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What experimental factors affect the effectiveness of sunscreen agents in providing protection against UV radiation?

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

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What is the formal charge of the carbon atom in the compound CH3COOH? Show your calculations.

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

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What are the specific enzymes responsible for metabolizing a certain group of drugs used in treating hypertension, and how do variations in these enzymes affect the efficacy and potential adverse effects of the drugs?

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

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What is the heat of formation of methane (CH4) at standard conditions (25°C and 1 atm pressure) using the bond energy method?

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

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What is the activation energy for the electrochemical reaction occurring between zinc and copper ions, given that the reaction has a rate constant of 1.5 x 10^-4 mol L^-1 s^-1 at 25°C and a rate constant of 6.2 x 10^-3 mol L^-1 s^-1 at 40°C?

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

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What is the maximum power output of a galvanic cell consisting of a zinc electrode and a copper electrode, with a concentration of 0.1 M Zn2+ and 0.01 M Cu2+? Assume a standard hydrogen electrode (SHE) as the reference electrode and a temperature of 25°C.

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

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What is the diffusion coefficient of a solute with a molecular weight of 100 g/mol in water at 25°C, when the solute concentration is 0.01 M and the diffusion rate is 1.5 × 10^-5 cm^2/s?

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

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What is the exchange current density for the oxidation of iron in a 0.1 M solution of Fe2+/Fe3+ at 25°C if the standard potential of the couple is +0.77 V and the overpotential is 0.2 V?

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

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How much mass of silver (Ag) will be deposited onto a cathode during the electrolysis of a silver nitrate (AgNO3) solution using a current of 2.5 A for 20 minutes? The molar mass of silver is 107.868 g/mol and the Faraday constant is 96,485 C/mol.

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

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Using molecular orbital theory, calculate the bond order of CO molecule and determine if it is paramagnetic or diamagnetic.

asked Mar 1 in Chemical bonding 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 yield of benzocaine that can be obtained by the reaction of 5 grams of p-aminobenzoic acid and 10 mL of ethanol assuming 100% conversion efficiency and pure product formation?

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

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What is the surface area of a sample of activated charcoal if the BET plot data at a nitrogen pressure of 0.98 atm gives a monolayer capacity of 0.16 mol/g and the weight of the sample used is 0.25 g? (Assume the density of the charcoal to be 2.2 g/cm³)

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

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What is the bond enthalpy of the carbon-carbon bond in a molecule of ethane? Given that the enthalpy change for the reaction C2H6(g) → 2CH3(g) is +84.7 kJ/mol, calculate the bond enthalpy for the C-C bond in ethane.

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

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What is the Gibbs free energy change for the reaction where 2 moles of hydrogen gas (H2) react with 1 mole of oxygen gas (O2) to form 2 moles of water vapor (H2O) at standard conditions (298 K and 1 atm pressure)?

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

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What is the lattice energy of sodium chloride (NaCl) given that the distance between the sodium and chloride ions is 2.82 Å and the charges on the ions are +1 and -1 respectively?

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

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