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Calculate the electronic and optical properties such as bandgap energy, Exciton binding energy, and absorption coefficient of a CdSe quantum dot having a diameter of 3.5 nm using Density Functional Theory.

asked Jan 23 in Quantum Chemistry by OmerFinsch09 (2.1k points)

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1 answer 55 views

Calculate the electronegativity difference between hydrogen (electronegativity of 2.20) and chlorine (electronegativity of 3.16) and determine the type of bond formed between them according to the electronegativity difference classification.

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

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Calculate the electronegativity difference between chlorine (Cl) and sodium (Na) atoms, and determine the type of bond that would form between them.

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

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1 answer 59 views

Calculate the electronegativity difference between carbon and hydrogen in a methane (CH4) molecule using the Pauling scale of electronegativity.

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

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1 answer 64 views

Calculate the electronegativity difference between carbon and hydrogen atoms in methane (CH4). Show the steps involved in the calculation and explain what the value of the electronegativity difference indicates about the bonding between the atoms.

asked Jan 23 in Chemical bonding by LaureneMcAle (1.8k points)

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1 answer 60 views

Calculate the electronegativity difference between a hydrogen atom (H) and a chlorine atom (Cl) in the molecule HCl.

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

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Calculate the electrical double layer thickness of a silica particle with a radius of 50 nm, assuming the particle is in water at room temperature and has a surface charge density of -0.05 C/m².

asked Jan 23 in Physical Chemistry by AstridMusser (1.9k points)

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1 answer 56 views

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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1 answer 56 views

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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1 answer 38 views

Calculate the effect of adding a buffer solution consisting of equal amounts of acetic acid (pKa = 4.76) and sodium acetate to a 0.1 M solution of acetic acid (Ka = 1.8 x 10^-5) at equilibrium. The volume of the buffer added is equal to the volume of the acetic acid solution.

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

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Calculate the direction in which the equilibrium position will shift for the following reaction if the pressure is increased: N2(g) + 3H2(g) ⇌ 2NH3(g) ∆H° = -92.4 kJ/mol. Use Le Chatelier's principle to justify your answer.

asked Jan 23 in Chemical reactions by MontePlott51 (2.0k points)

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Calculate the dipole moment of carbon dioxide molecule and determine its polarity.

asked Jan 23 in Chemical bonding by KirstenLipsc (1.8k points)

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Calculate the density of solid sodium chloride given that its mass is 5.50 g and its volume is 2.50 cm³.

asked Jan 23 in Inorganic Chemistry by Dawn49061396 (2.1k points)

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1 answer 65 views

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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1 answer 66 views

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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Calculate the current density in an electrochemical cell if a current of 2.5 A is passed through a copper electrode with a surface area of 25 cm² and a silver electrode with a surface area of 10 cm² for 3 hours. The half-cell potentials of copper and silver electrodes are +0.34 V and +0.80 V, respectively, and the molar concentrations of copper and silver ions in the electrolyte are 0.5 M and 1 M, respectively.

asked Jan 23 in ElectroChemistry by IsabellaOcto (1.9k points)

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1 answer 51 views

Calculate the current density in an electrochemical cell if a current of 2.5 A is passed through a cell containing 0.150 L of a 0.250 M solution of CuSO4 for 2.00 hours. The cathodic half-reaction is Cu2+ + 2e- → Cu and the anodic half-reaction is Zn → Zn2+ + 2e-. The cell has a standard potential of 1.10 V at 298 K. What is the current density of the cell?

asked Jan 23 in ElectroChemistry by AmyNowland4 (2.5k points)

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1 answer 56 views

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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1 answer 49 views

Calculate the corrosion rate of an iron rod with a surface area of 20 cm² that is connected to a copper plate with a surface area of 25 cm², immersed in a solution of 0.5 M copper sulfate, given that the measured current is 0.2 A.

asked Jan 23 in ElectroChemistry by DebFannin623 (1.8k points)

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Calculate the corrosion rate of a steel rod when it is placed in a galvanic coupling with a copper strip at 25°C. The initial weight of the steel rod was 28.6 g and it lost 0.48 g in weight after 24 hours of exposure. The area of the steel rod in contact with the electrolyte solution is 3.14 cm² and the electrode potential of the copper strip is +0.34V while the electrode potential of the steel rod is -0.44V. Using Faraday’s law of electrolysis, determine the corrosion rate of the steel rod in mmpy (mils per year).

asked Jan 23 in ElectroChemistry by DeanneMack98 (2.1k points)

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