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Here is a precise question for the student to solve:A chemical reaction occurs in a closed system that results in a change in temperature, but without any change in volume. Using non-equilibrium thermodynamics and irreversible processes, determine the amount of heat absorbed or released by the reaction if the entropy change is known to be 25 J/K.

asked Feb 4 in Physical Chemistry by MarielScully (1.4k points)

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Here is a precise problem for the student to solve:Using ab initio calculations, determine the electronic structure and energetics of a transition metal complex, specifically a ruthenium-based complex with ligands consisting of two bipyridine molecules and one 2,2'-bipyridine-4,4'-dicarboxylic acid molecule. Compare the calculated properties to experimental data and discuss the accuracy of the theoretical approach used.

asked Feb 4 in Computational Chemistry by RobertoLafla (2.1k points)

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Here is a precise problem for the student to solve:How does the molecular weight of a polymer affect its physical properties such as viscosity and elasticity? Provide experimental evidence to support your answer.

asked Feb 4 in Physical Chemistry by August936905 (1.5k points)

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Here is a precise problem for the student to solve:A copper electrode is placed in a solution of copper nitrate with a concentration of 0.1 M, while a platinum electrode is placed in a solution of hydrogen peroxide. The potential difference of the half-reactions for the copper/copper(II) and hydrogen peroxide/water couples are +0.34 V and +1.77 V, respectively. Calculate the current density (in A/m²) at the copper electrode when a current of 0.25 A is passed through the cell for 10 minutes.

asked Feb 4 in ElectroChemistry by HarryHodgkin (2.2k points)

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Here is a possible question for the student to solve:How does the photochemical behavior of metal complexes depend on the nature of ligands and metal centers, and how can this information be used to design new photoactive materials for various applications, such as light-driven catalysts, sensors, or photovoltaic devices?

asked Feb 4 in PhotoChemistry by BrianCherry (1.7k points)

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1 answer 77 views

Here is a chemistry problem related to renewable energy sources and their impact on the environment:What is the net energy yield and the carbon footprint of producing ethanol fuel from corn stover waste (a byproduct of corn cultivation) using a biochemical conversion process, and how does it compare to producing gasoline from crude oil in terms of environmental impact?

asked Feb 4 in Environmental Chemistry by IeshaC20996 (1.7k points)

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1 answer 54 views

Given the reaction:2HgO(s) → 2Hg(l) + O2(g)Calculate the standard enthalpy change ($\Delta H$) and standard entropy change ($\Delta S$) at 298 K, if the standard enthalpy of formation of HgO(s), Hg(l), and O2(g) are -90.8 kJ/mol, 0 kJ/mol, and 0 kJ/mol, respectively.

asked Feb 4 in Inorganic Chemistry by MatthewStore (1.3k points)

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1 answer 72 views

Given the reaction between sulfuric acid and sodium hydroxide, predict the chemical equation for the products formed and balance the reaction. Calculate the amount of sulfuric acid needed to neutralize 20 grams of sodium hydroxide.

asked Feb 4 in Inorganic Chemistry by SVNCarissa5 (1.8k points)

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Given the reaction A + B ⇌ C and the equilibrium constant, Kc = 2.0 at a certain temperature, if the initial concentration of A is 0.1 M and the initial concentration of B is 0.2 M, what is the equilibrium concentration of C if the reaction proceeds with a rate constant of 0.05 M/s?

asked Feb 4 in Chemical kinetics by BlairMorrill (1.9k points)

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1 answer 86 views

Given the reactants Copper(II) chloride and Sodium hydroxide, predict the products of the reaction and write the balanced chemical equation.

asked Feb 4 in Inorganic Chemistry by CherylDooley (1.7k points)

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1 answer 63 views

Given the molecular formula of a diatomic molecule (A2), how can we use calculation of molecular orbitals to determine the bond order and predict the bond length?

asked Feb 4 in Quantum Chemistry by MarciaBrooke (1.8k points)

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1 answer 53 views

Given the molecular formula FeCl3, determine the oxidation states of the iron and chlorine atoms in the compound.

asked Feb 4 in Chemical reactions by CassieClopto (2.4k points)

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1 answer 74 views

Given the inorganic compound Mg(ClO)2, predict its stability based on the characteristics of its constituent atoms and molecular geometry.

asked Feb 4 in Inorganic Chemistry by DanaPittmann (1.5k points)

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1 answer 86 views

Given the following unbalanced chemical equation: Fe + HCl → FeCl3 + H2, what is the balanced equation for the reaction and how many moles of hydrogen gas will be formed when 0.25 moles of Fe react with an excess of HCl?

asked Feb 4 in Chemical reactions by AlineBentham (2.1k points)

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1 answer 54 views

Given the following reaction at standard conditions:Cu(s) + 2Ag+(aq) -> Cu2+(aq) + 2Ag(s) Calculate the cell potential, E°cell, at 25°C using the standard reduction potentials:Cu2+(aq) + 2e- -> Cu(s), E°red = +0.34 VAg+(aq) + e- -> Ag(s), E°red = +0.80 V

asked Feb 4 in ElectroChemistry by Phillipp57B1 (2.3k points)

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1 answer 59 views

Given the following information: A polymerization reaction has a heat of reaction of -150 kJ/mol and a Δn (change in moles of gas) of +2 moles gas/mol. If 5.0 g of the monomer is polymerized, what is the enthalpy change (in kJ) for the overall reaction?

asked Feb 4 in ThermoChemistry by ElenaBriscoe (2.1k points)

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1 answer 71 views

Given the following half-reactions:Cu²⁺ (aq) + 2e⁻ → Cu (s) E° = +0.34 VAg⁺ (aq) + e⁻ → Ag (s) E° = +0.80 VWhat is the cell potential for the reaction when a copper electrode is paired with a silver electrode in a standard electrochemical cell?

asked Feb 4 in ElectroChemistry by ElyseY075419 (1.7k points)

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1 answer 40 views

Given the following half-reactions:Cu2+ (aq) + 2 e- -> Cu (s) E° = +0.34 VZn2+ (aq) + 2 e- -> Zn (s) E° = -0.76 VCalculate the equilibrium constant (K) for the reaction: Cu2+ (aq) + Zn (s) -> Zn2+ (aq) + Cu (s)

asked Feb 4 in ElectroChemistry by AndreasLdp14 (1.7k points)

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1 answer 65 views

Given the following equilibrium reaction: Fe3+(aq) + 4CN-(aq) <--> Fe(CN)64-(aq)If the equilibrium constant, Kc, is equal to 1.2 x 10^10 at 25°C, what will be the value of Kc at 50°C? And how will the equilibrium position shift when the temperature is changed from 25°C to 50°C?

asked Feb 4 in Chemical equilibrium by TonyaCombs22 (1.8k points)

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Given the following equations and their respective enthalpy changes:1) 2H2 (g) + O2 (g) → 2H2O (l) ΔH = -484 kJ/mol 2) C2H5OH (l) + 3O2 (g) → 2CO2 (g) + 3H2O (l) ΔH = -1,367 kJ/mol 3) C2H5OH (l) → C2H4 (g) + H2O (g) ΔH = +44 kJ/mol Using Hess’s Law, determine the ΔH for the following reaction: C2H5OH (l) → 2CO2 (g) + 3H2 (g)

asked Feb 4 in Chemical reactions by JordanHering (2.2k points)

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