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Calculate the formal charge on the nitrogen atom in the molecule NO3-.

asked Jan 23 in Chemical bonding by JerroldCleve (2.0k points)

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Calculate the current density of an electrochemical cell where a nickel electrode is oxidized to form nickel (II) ions, while a copper electrode is reduced by the nickel (II) ions. The cell has a voltage of 0.65 volts and a resistance of 50 ohms. The surface area of the nickel electrode is 10 cm² while that of the copper electrode is 15 cm². The current density of the electrochemical cell is expressed in A/cm².

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

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1 answer 108 views

A chemistry student is experimenting with the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g). They want to investigate the effect of pressure on the yield of ammonia. Write a problem for the student to solve using Le Chatelier's principle that will help them predict the effect of changes in pressure on the equilibrium position of the reaction.

asked Jan 22 in Chemical reactions by LorenzoWooll (1.7k points)

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1 answer 103 views

A chemistry student wants to determine the effect of adding more reactant or product on the equilibrium position of a chemical reaction. The student has a 0.50 M solution of N2O4 and NO2 at equilibrium at 25°C, with the equation N2O4(g) <--> 2NO2(g). If the student adds more N2O4 to the reaction mixture, what will happen to the equilibrium concentration of NO2? Will it increase, decrease or stay the same? Justify your answer with a chemical equation and relevant calculations.

asked Jan 22 in Chemical equilibrium by CarrieMadiso (1.8k points)

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Calculate the enthalpy change of the reduction reaction of Fe3+ to Fe2+ when 1.44 g of Fe3+ ions are reduced using a standard hydrogen electrode (E° = 0.00 V) at 298 K. The balanced half-reaction equations are given below:Fe3+ + e- → Fe2+ ( E° = +0.77 V)H+ + e- → 1/2 H2(g) ( E° = 0.00 V)

asked Jan 23 in ThermoChemistry by XHQMikel9006 (2.0k points)

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1 answer 55 views

Calculate the enthalpy of vaporization for water at 100 °C, given that the vapor pressure of water is 101.325 kPa and its molar volume is 18.07 L/mol at boiling point.

asked Jan 23 in ThermoChemistry by Murray05Y450 (1.9k points)

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1 answer 51 views

Calculate the internal energy and entropy change for a gas that undergoes an isothermal expansion from 2.0 L to 3.0 L at a constant temperature of 300 K.

asked Jan 23 in Physical Chemistry by CletaF793120 (2.8k points)

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1 answer 62 views

Calculate the enthalpy change for the polymerization reaction of ethylene to form polyethylene using the bond dissociation energies listed below: C-H bond energy = 413 kJ/mol C=C bond energy = 602 kJ/mol Assume that the polymerization reaction proceeds via breaking of the C=C bond followed by formation of the C-C bond in polyethylene.

asked Jan 23 in ThermoChemistry by LXJGinger283 (2.2k points)

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1 answer 53 views

Calculate the formal charge of nitrogen in the molecule NO₃⁻.

asked Jan 23 in Chemical bonding by CheryleCass8 (1.7k points)

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1 answer 102 views

A chemistry student wants to study the isomerism in coordination compounds through the structural formulas and their properties. Can you identify and compare the geometric and optical isomers for the coordination complex [Co(NH3)5Cl]2+? Also, determine whether the complex is chiral or achiral.

asked Jan 22 in Coordination Chemistry by BroderickHom (2.1k points)

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1 answer 66 views

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 53 views

Calculate the equilibrium constant, Kc, for the reaction below at 25°C if the concentration of CO2 is 1.2 M, the concentration of H2 is 0.8 M and the concentration of CO is 0.6 M.CO2(g) + H2(g) ⇌ CO(g) + H2O(g)

asked Jan 23 in Chemical equilibrium by JanieCorso7 (1.9k points)

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1 answer 62 views

Calculate the enthalpy change for the ionization of magnesium, given that it requires 738 kJ/mol to remove an electron from a gaseous magnesium atom, and that the ionization energy for a second electron is 1450 kJ/mol.

asked Jan 23 in ThermoChemistry by XLNDorris808 (1.7k points)

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1 answer 61 views

Calculate the enthalpy change of dissolving 10 grams of NaCl in 100 mL of water, assuming the resultant solution has a density of 1.0 g/mL and assuming that the heat evolved is absorbed by the water. Given: the enthalpy of hydration of NaCl is -787 kJ/mol.

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

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1 answer 50 views

Calculate the magnetic properties (magnetic dipole moment, total angular momentum, and g-tensor) of a water molecule using quantum chemical methods and compare them with the experimental values.

asked Jan 23 in Quantum Chemistry by HarleyOreill (1.9k points)

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1 answer 60 views

Calculate the enthalpy of adsorption when 2.5 grams of hydrogen gas is adsorbed onto a surface at a temperature of 298 K. The equilibrium pressure of hydrogen gas at this temperature is 1.5 atm and the surface area of the adsorbent is 50 cm². (Assume ideal gas behavior and that the adsorption occurs under standard conditions.)

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

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1 answer 52 views

Calculate the Gibbs Free Energy change for the following chemical reaction at 298 K:2H2(g) + O2(g) → 2H2O(l) Given the standard Gibbs free energy of formation values: ΔGf°[H2(g)] = 0 kJ/molΔGf°[O2(g)] = 0 kJ/molΔGf°[H2O(l)] = -237 kJ/mol

asked Jan 23 in Chemical thermodynamics by JordanHering (2.2k points)

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1 answer 66 views

Calculate the change in entropy for the reaction: 2H2(g) + O2(g) → 2H2O(g)if the standard entropy values of H2, O2, and H2O are 130.7 J/mol*K, 205.0 J/mol*K, and 188.7 J/mol*K, respectively.

asked Jan 23 in Inorganic Chemistry by JoelPrentice (1.4k points)

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1 answer 51 views

Calculate the heat of hydration for the reaction where 1 mol of anhydrous copper sulfate combines with 5 mol of water to form 1 mol of hydrated copper sulfate given that the enthalpy change of the reaction is -65 kJ/mol.

asked Jan 23 in ThermoChemistry by DannieGuf001 (2.3k points)

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1 answer 61 views

Calculate the enthalpy change for the reaction: 2H2 (g) + O2 (g) → 2H2O (l) given that the standard enthalpy of formation for water is -285.8 kJ/mol, and standard enthalpies of formation of H2 (g) and O2 (g) are 0 kJ/mol.

asked Jan 23 in Chemical thermodynamics by KaraMcRae960 (2.5k points)

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