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Calculate the density of barium sulfate ($\text{BaSO}_{4}$) with a molecular weight of 233.39 g/mol, assuming a sample with a mass of 5 g occupies a volume of 3 mL.

asked Jan 23 in Inorganic Chemistry by MoniqueBrins (1.9k points)

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Calculate the entropy change for the reaction of 2 moles of methane gas reacting with 4 moles of oxygen gas to form carbon dioxide gas and water vapor at a constant temperature of 298 K. The reaction is balanced and the standard entropy values for methane, oxygen, carbon dioxide, and water vapor are given as -0.242, 205.16, 213.74, and 188.72 J/K/mol, respectively.

asked Jan 23 in Chemical thermodynamics by JackQ7308746 (2.0k points)

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Calculate the enthalpy of solution of sodium chloride (NaCl) when 10 grams of NaCl is dissolved in 100 mL of water assuming that the specific heat capacity of the solution is equal to the specific heat capacity of water (4.18 J/g°C) and the temperature change is negligible.

asked Jan 23 in ThermoChemistry by MichelleHall (2.0k points)

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Calculate the enthalpy change for the combustion of methane gas (CH4) at standard conditions using the given relevant thermodynamic data:2H2(g) + O2(g) -> 2H2O(g); ΔH° = -483.7 kJ/molCH4(g) + 2O2(g) -> CO2(g) + 2H2O(g); ΔH° = ?

asked Jan 23 in Chemical thermodynamics by BradyBassett (2.0k points)

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Calculate the enthalpy change for the combustion of methane (CH4) at constant pressure, given that the heat of formation for methane is -74.9 kJ/mol and the balanced chemical equation is: CH4 (g) + 2O2 (g) -> CO2 (g) + 2H2O (l) The heat of formation for CO2 is -393.5 kJ/mol and the heat of formation for H2O is -285.8 kJ/mol.

asked Jan 23 in Chemical reactions by AdolphI79338 (1.8k points)

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Calculate the enthalpy change of oxidation for the combustion of 1 mole of ethane gas (C₂H₆) in oxygen gas (O₂) to form carbon dioxide gas (CO₂) and water vapor (H₂O), given the following enthalpies of formation: ΔHf(C₂H₆) = -84.7 kJ/mol, ΔHf(CO₂) = -393.5 kJ/mol, ΔHf(H₂O) = -241.8 kJ/mol.

asked Jan 23 in ThermoChemistry by Anglea937174 (1.9k points)

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Calculate the enthalpy of desorption of carbon dioxide (CO2) from a surface if the surface coverage is 0.025 mol/m² and the temperature is 298 K. The enthalpy of adsorption for CO2 on the surface is -35.8 kJ/mol. The equilibrium constant (K) for the reaction is 2.99 x 10⁶ at 298 K.

asked Jan 23 in ThermoChemistry by VerleneSchut (1.7k points)

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Calculate the melting point of sodium chloride (NaCl) given that its enthalpy of fusion is 28.9 kJ/mol and its entropy of fusion is 41.3 J/K/mol.

asked Jan 23 in Inorganic Chemistry by KyleWaddy213 (1.9k points)

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Calculate the heat of sublimation for water when 10 g of ice sublimes at standard conditions (1 atm, 25°C)? Given: Heat of fusion of ice is 6.01 kJ/mol; Heat of vaporization of water is 40.67 kJ/mol.

asked Jan 23 in ThermoChemistry by ClaraCraddoc (1.6k points)

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Calculate the corrosion potential for an iron electrode in a galvanic couple with a standard hydrogen electrode at 25°C if the concentration of Fe2+ ion is 0.05 M and pH is 7.

asked Jan 23 in ElectroChemistry by TerrieGaffne (1.6k points)

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1 answer 80 views

Calculate the enthalpy change of isomerization for the conversion of cis-but-2-ene to trans-but-2-ene if the enthalpy of formation of cis-but-2-ene is -24.7 kJ/mol and the enthalpy of formation of trans-but-2-ene is -28.6 kJ/mol. The heat of combustion of but-2-ene is -2723 kJ/mol.

asked Jan 23 in ThermoChemistry by EttaKee54894 (2.1k points)

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1 answer 80 views

Calculate the enthalpy change of ionization for magnesium given the following data: Mg(g) → Mg+(g) + e- ΔH1 = +738 kJ/mol Mg+(g) → Mg2+(g) + e- ΔH2 = +1451 kJ/mol

asked Jan 23 in ThermoChemistry by Georgianna69 (2.2k points)

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1 answer 69 views

Calculate the mass of sodium chloride (NaCl) produced when 2.5 moles of sodium (Na) react completely with excess chlorine gas (Cl2). (Hint: Use the balanced chemical equation 2Na + Cl2 → 2NaCl)

asked Jan 23 in Chemical reactions by FranY1408156 (2.2k points)

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Calculate the heat of mixing when 50.0 mL of 1.00 M HCl is added to 50.0 mL of 1.00 M NaOH at 25°C. The heat capacity of the solution is 4.18 J/(g·°C) and the density of the final solution is 1.00 g/mL. Assume that the heat change is equal to the enthalpy change.

asked Jan 23 in ThermoChemistry by EvieOconnor (2.3k points)

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1 answer 84 views

Calculate the enthalpy change (∆H) for the combustion reaction of methane gas (CH4) using Hess’s Law, when the enthalpy changes for the following reactions are given: Reaction 1: CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (l); ∆H = -891 kJ/mol Reaction 2: C (s) + O2 (g) → CO2 (g); ∆H = -393.5 kJ/mol Reaction 3: 2H2 (g) + O2 (g) → 2H2O (l); ∆H = -484 kJ/mol

asked Jan 23 in ThermoChemistry by SueCasteel38 (1.4k points)

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1 answer 86 views

Calculate the bond order and bond length of the carbon monoxide (CO) molecule. Show your work and state the type of bond formed between carbon and oxygen in CO.

asked Jan 23 in Inorganic Chemistry by KristopherMi (2.1k points)

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Calculate the enthalpy change of desorption for a solid substance using the given data: The mass of the substance is 2.5 g, and the temperature change during desorption is 25 °C. The heat capacity of the substance is 1.5 J/g·°C. The molar mass of the substance is 150 g/mol. Assume that the desorption process takes place at constant pressure.

asked Jan 23 in ThermoChemistry by YasminWorrel (2.2k points)

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1 answer 86 views

Calculate the bond length between two hydrogen atoms that are covalently bonded together. Given that the distance between their nuclei is 74 pm and assume the bond is a perfect covalent bond with no ionic character.

asked Jan 23 in Chemical bonding by ScarlettRobb (1.7k points)

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1 answer 77 views

Calculate the enthalpy of oxidation for the reaction of 2 moles of magnesium (Mg) with 1 mole of oxygen gas (O2) under standard conditions. Given the standard enthalpy of formation (ΔH°f) of MgO is -601.8 kJ/mol.

asked Jan 23 in ThermoChemistry by CalvinHornin (1.6k points)

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1 answer 69 views

Calculate the magnetic moment of Fe(CO)₅ using Molecular Orbital Theory.

asked Jan 23 in Inorganic Chemistry by DanielleVanw (2.3k points)

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