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What is the change in enthalpy and entropy for the reaction of 2 moles of sodium hydroxide with 1 mole of sulfuric acid to form 2 moles of water and 1 mole of sodium sulfate, assuming standard conditions?

asked Mar 1 in Inorganic Chemistry 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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Using molecular orbital theory, calculate the bond order of the molecule N2+.

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

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What is the diffusion coefficient of a gas (in cm²/s) at 25°C and 1 atm pressure if its root-mean-square velocity is 400 m/s and the gas constant R is 8.314 J/mol·K? The gas has a molar mass of 32 g/mol and a collision diameter of 3.5 Å.

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

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What are the specific skills and practical experiences that chemistry students need to acquire during their undergraduate studies, in order to be adequately prepared for chemistry-related careers in industry or academia?

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

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What is the standard enthalpy change for the reaction 2H₂(g) + O₂(g) -> 2H₂O(l), given the standard enthalpies of formation for H₂O(l), H₂(g) and O₂(g) as -285.8 kJ/mol, 0 kJ/mol and 0 kJ/mol, respectively?

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

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What is the density of a 25.0 mL solution of potassium chloride with a mass of 31.5 grams at 25°C?

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

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What is the enthalpy change in kilojoules for the reaction:2H2(g) + O2(g) → 2H2O(l)given that the standard enthalpy of formation for liquid water is -285.8 kJ/mol, and the standard enthalpy of formation for hydrogen gas and oxygen gas are 0 kJ/mol?

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

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What are the common factors that affect a student's understanding of the periodic table and chemical elements?

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

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What factors affect the stability of oil-in-water emulsions and how can they be manipulated to enhance the stability of the emulsion?

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

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What is the entropy change for the combustion of methane (CH4) at constant pressure and standard conditions (298 K and 1 atm)?

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

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How can the use of Ab initio calculations improve our understanding of excited state dynamics in chemical reactions?

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

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What is the enthalpy change for the combustion of propane?

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

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How can the synthesis of zeolites be optimized for increased efficiency and yield, and what impact does varying precursor materials and synthesis conditions have on the resulting physical and chemical properties of the zeolite product?

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

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What is the pH of a 0.1 M solution of hydrochloric acid at 25°C?

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

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What is the lattice energy of CaCl2 given that the crystal has a distance of 2.80 Angstroms between the Ca2+ and Cl- ions and the charge on each ion is +2 and -1 respectively?

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

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What is the anodic Tafel slope for the oxidation of Fe in a 0.1 M FeCl2 solution at a current density of 0.5 mA/cm2? Use the given data: T = 298 K, A = 0.2 cm2, and the exchange current density is 0.1 mA/cm2.

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

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How does the zeta potential affect the stability of a colloidal system, and how can it be measured experimentally?

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

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How can the use of polymer-based optical materials enhance the performance of organic solar cells, and what are the specific properties that make these materials effective in this application?

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

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What is the enthalpy of vaporization of water if it takes 40 kJ of energy to vaporize 20 g of water at 100°C?

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

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