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Calculate the anodic Tafel slope for an electrochemical cell in which the corrosion current density is 0.05 mA/cm² and the anodic overpotential is 50 mV. The exchange current density for the anodic reaction is 0.02 mA/cm².

asked Jan 23 in ElectroChemistry by OrvalLasley3 (2.1k points)

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1 answer 98 views

A chemistry student is given an unknown compound and is required to identify its molecular structure using mass spectrometry. How can the student analyze the mass spectrum data to determine the compound's molecular weight and possible functional groups?

asked Jan 22 in Analytical Chemistry by WallaceMaria (2.4k points)

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Calculate the lattice energy of sodium chloride (NaCl) using Born-Haber cycle and Hess's law. Given the following data:- Enthalpy of sublimation of sodium (Na): +108.6 kJ/mol- Enthalpy of dissociation of chlorine (Cl2): +243.0 kJ/mol- Bond energy of Na-Cl bond: -412.0 kJ/mol- Ionization energy of sodium (Na): +496.0 kJ/mol- Electron affinity of chlorine (Cl): -349.0 kJ/mol- Heat of formation of sodium chloride (NaCl): -411.0 kJ/mol.

asked Jan 23 in Inorganic Chemistry by MartyLeSouef (2.0k points)

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Calculate the enthalpy of ionization of hydrogen gas (H₂) given that it requires 1312 kJ/mol to ionize a single hydrogen atom (H) in the gas phase.

asked Jan 23 in ThermoChemistry by DanaPittmann (1.5k points)

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Calculate the enthalpy change in kJ/mol for the combustion of butane (C4H10) given that the heat of formation of CO2(g) is -393.5 kJ/mol, the heat of formation of H2O(l) is -285.8 kJ/mol, and the heat of formation of C4H10(g) is -126 kJ/mol. The balanced equation for the combustion of butane is:2C4H10(g) + 13O2(g) → 8CO2(g) + 10H2O(l) + heat.

asked Jan 23 in ThermoChemistry by SelmaHartsoc (1.8k points)

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Calculate the equilibrium constant (Kc) for the reaction between iodine (I2) and potassium iodide (KI) in an aqueous solution, given that at equilibrium, the concentration of iodine is 0.008 M and the concentration of potassium iodide is 0.15 M. The balanced equation for the reaction is given below:I2 (aq) + 2KI (aq) ⇌ 2K+ (aq) + 2I- (aq)

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

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Calculate the lattice energy of NaF given the following information: the enthalpy of formation of NaF is -572.6 kJ/mol, the ionization energy of Na is 495.8 kJ/mol, the electron affinity of F is -328 kJ/mol, and the Madelung constant for NaF is 1.747.

asked Jan 23 in Inorganic Chemistry by TereseAbner (1.8k points)

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Calculate the efficiency of an electrochemical cell with a standard potential of +0.80 V if the cell potential under operating conditions is +0.60 V and the current passing through the cell is 2.5 A.

asked Jan 23 in ElectroChemistry by LouellaComo (1.5k points)

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Calculate the effect of adding a catalyst on the equilibrium position of the following redox reaction: Fe2+(aq) + H2O2(aq) + 2H+(aq) ⇌ Fe3+(aq) + 2H2O(l) If a catalyst is added to the reaction mixture, what will be the new equilibrium constant (Kc)? And how will the addition of a catalyst affect the value of Kc?

asked Jan 23 in Chemical equilibrium by LorrineA1626 (1.6k points)

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Calculate the enthalpy of ionization for sodium ion (Na+) given that the first ionization energy of sodium (Na) is 495.8 kJ/mol and the second ionization energy is 4562 kJ/mol.

asked Jan 23 in ThermoChemistry by MaynardErb58 (2.0k points)

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1 answer 58 views

Calculate the bond length between a carbon (C) and an oxygen (O) atom in carbon monoxide (CO), given that the bond energy is 1070 kJ/mol and the force constant is 1070 N/m.

asked Jan 23 in Chemical bonding by Beatris09Q13 (1.9k points)

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Calculate the bond energy required to break the carbon-carbon single bond in methane (CH4).

asked Jan 23 in Chemical reactions by BrodieUus47 (1.7k points)

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Calculate the bond energy required to break all the C-H bonds in a mole of methane (CH4) gas.

asked Jan 23 in Chemical reactions by ShanaHarpole (1.5k points)

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A student prepares a coordination compound [CoBr(NH3)5]SO4 by reacting cobalt(II) sulfate with ammonium bromide and ammonia. However, the student finds that there are two possible products formed in the reaction. Explain the type of isomerism present in the coordination compound and identify the two isomers formed by the student.

asked Jan 22 in Coordination Chemistry by PartheniaBar (2.2k points)

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Calculate the corrosion rate of iron (Fe) in a galvanic couple with copper (Cu), given that the area of the iron electrode is 8 cm² and the current density is 0.6 mA/cm². The standard electrode potential of iron is -0.44 V and that of copper is +0.34 V.

asked Jan 23 in ElectroChemistry by Precious09K0 (2.0k points)

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Calculate the cell potential for the reaction:Hg2Cl2(s) + 2 Cl-(aq) → 2 Hg(l) + 2 Cl2(g)Given the standard reduction potentials: Hg2Cl2(s) + 2 e- → 2 Hg(l) + 2 Cl-(aq) E° = 0.268 VCl2(g) + 2 e- → 2 Cl-(aq) E° = 1.36 V

asked Jan 23 in ElectroChemistry by FletaStepp73 (2.0k points)

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1 answer 52 views

Calculate the enthalpy change for the process of desorption of carbon dioxide from a zeolite adsorbent at a temperature of 298 K, given that the heat of adsorption for carbon dioxide on the same zeolite at the same temperature is -40 kJ/mol.

asked Jan 23 in ThermoChemistry by GarnetFjo447 (1.8k points)

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1 answer 45 views

Calculate the enthalpy of vaporization of water given that it has a vapor pressure of 1.00 atm at 100°C and its molar enthalpy of vaporization at 373 K is 40.7 kJ/mol.

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

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1 answer 58 views

Calculate the bond dissociation energy of the H-H bond in the H2 molecule. Given the bond length of H2 is 74 pm and the enthalpy change for the reaction H2(g) → 2H(g) is 436 kJ/mol.

asked Jan 23 in Chemical bonding by SoniaFanny4 (2.3k points)

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1 answer 92 views

A compound contains 29.5% sodium, 41.1% sulfur, and 29.4% oxygen by mass. Determine the empirical formula of the compound.

asked Jan 22 in Inorganic Chemistry by BFFRachelle (1.8k points)

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