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What is the molar mass of magnesium chloride (MgCl2)? Show the calculation method.

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

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What are the most effective and safe methods for disposing of radioactive waste that minimize impact on the environment and human health?

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

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What is the heat of hydration of calcium chloride when 50 grams of calcium chloride is dissolved in 200 mL of water at 25°C? Given the heat of hydration of calcium chloride is -82.8 kJ/mol.

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

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What is the formal charge of the central atom in the compound SF4 (sulfur tetrafluoride)? Show your calculation and explain whether the molecule is overall neutral or has a partial charge.

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

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What is the heat of hydration for the dissolution of 10 grams of calcium chloride in 200 mL of water at a temperature of 25 degrees Celsius? Given that the heat of hydration of calcium chloride is -82.8 kJ/mol.

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

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What conditions and reaction parameters are necessary to achieve high yield and purity in the synthesis of polyacrylonitrile from acrylonitrile monomer? How do changes in these parameters affect the polymerization reaction and final product properties?

asked Mar 1 in Chemical synthesis 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 diffusivity of oxygen gas in air at 25°C and 1 atm pressure? Assume ideal gas behavior and provide your answer in SI units.

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

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What is the enthalpy change for the reduction of CuO using hydrogen gas, given that 2.50g of CuO (s) is reacted with 0.500L of H2 (g) at STP? The balanced chemical equation for the reaction is CuO (s) + H2 (g) -> Cu (s) + H2O (l).

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

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What is the enthalpy change for the reaction: 2H2(g) + O2(g) → 2H2O(l) given the following bond enthalpy values: H-H: 436 kJ/mol, O=O: 495 kJ/mol, H-O: 464 kJ/mol (assume that all gases are at standard conditions)?

asked Mar 1 in Chemical thermodynamics 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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What is the probability of finding a system composed of two ideal gas particles in a given volume, temperature and energy range? Use statistical mechanics and the canonical ensemble to calculate the probability and explain your results.

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

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Using the molecular orbital theory, calculate the bond order and predict the magnetic behavior of carbon monoxide (CO) according to its electronic structure.

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

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How does the use of chemical fertilizers in sustainable agriculture affect soil health and contribute to environmental pollution?

asked Feb 28 in Environmental Chemistry 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 are the possible challenges and limitations that can be encountered in the synthesis of zeolites using novel methods and how can they be overcome?

asked Feb 28 in Materials Chemistry by TheScientist (138k points)

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What is the equilibrium constant for the reaction: 2H2 (g) + O2 (g) ⇌ 2H2O (g)at 298 K, given that the partial pressures of H2 and O2 are 0.15 atm and 0.10 atm, respectively, at equilibrium?

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

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What is the balanced redox equation for the reaction between iron(II) chloride and potassium permanganate in acidic solution?

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

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What is the Gibbs free energy change for the reaction of hydrogen gas (H2) and chlorine gas (Cl2) to form hydrochloric acid (2HCl) at standard conditions (298 K and 1 atm)?

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

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What chemical modifications can be made to the structure of conductive polymers in order to improve their conductivity and make them suitable for use in flexible electronic devices?

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

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