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An industrial process involves the reaction of nitrogen gas and hydrogen gas to produce ammonia gas, in the presence of a catalyst. If the equilibrium constant for this reaction at a certain temperature is 6.2 × 10^-2 and the initial concentrations of nitrogen and hydrogen gases are 1.2 M and 0.8 M respectively, what would be the equilibrium concentrations of the reactants and products if the catalyst increases the rate of the forward reaction by a factor of 4?

asked Jan 22 in Chemical equilibrium by BlancaVennin (1.5k points)

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An aqueous solution of 1.0 M HCl is oxidized by a lead anode in a half-cell, while a half-cell with a hydrogen electrode is used as the standard reduction potential. If the electrode potential of the lead electrode is -0.13 V, what is the cell potential of the overall reaction?

asked Jan 22 in ElectroChemistry by OrenTherrien (1.8k points)

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A student needs to prepare a solution containing 50 g of ethanol (C2H5OH) dissolved in 250 g of water (H2O) at 25°C. Assuming the heat of mixing for ethanol and water is -5.02 kJ/mol, calculate the heat released or absorbed when the two substances are mixed. Express your answer in kJ.

asked Jan 22 in ThermoChemistry by PalmaYuille (2.1k points)

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A chemistry student wants to determine the bond enthalpy of hydrogen gas (H2). They have access to an experimental setup which can be used to measure the enthalpy change of a chemical reaction. How can the student determine the bond enthalpy of H2 using this setup?

asked Jan 22 in Chemical bonding by BroderickHom (2.1k points)

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Assuming that the student has knowledge about the harmonic oscillator model, the problem could be:Calculate the molecular vibrational frequencies and corresponding infrared spectra of a carbon monoxide (CO) molecule using the harmonic oscillator model. Given the following bond lengths and force constants:- Bond length of the CO bond in the ground state: 1.128 angstroms- Force constant of the CO bond in the ground state: 1880 N/m

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

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1 answer 73 views

Assuming standard conditions, calculate the standard enthalpy of combustion of methane (CH4), given that the standard enthalpies of formation of CH4 and H2O are -74.8 kJ/mol and -285.8 kJ/mol, respectively. The balanced chemical equation for the combustion of CH4 is:CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) What is the standard enthalpy change (ΔH°) for this reaction?

asked Jan 22 in ThermoChemistry by AguedaD83620 (2.6k points)

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1 answer 119 views

What is the pKa of acetic acid (CH3COOH) and how is it affected by the presence of an electron-withdrawing group on the adjacent carbon atom?

asked Jan 21 in Organic Chemistry by EveStamm873 (2.0k points)

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1 answer 162 views

What is the name of the theory that proposes that people can be influenced to perform immoral actions by being given an authority figure?

asked Jan 20 in Psychology by Latonya89F54 (2.2k points)

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A student wants to calculate the efficiency of an electrochemical cell with a standard potential of -0.74 volts. The cell is set up with a copper electrode immersed in a solution of copper(II) sulfate and a silver electrode immersed in a solution of silver nitrate, connected by a salt bridge. The student measures a current of 0.5 amperes flowing through the cell for a duration of 60 minutes. Calculate the efficiency of the electrochemical cell in terms of the amount of reactants consumed and the amount of product formed.

asked Jan 22 in ElectroChemistry by DannielleEdd (1.8k points)

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A chemistry student needs to determine the concentration of iron (III) ions in a water sample using spectrophotometry. The water sample contains an unknown amount of iron (III) ions that need to be quantified with a high degree of accuracy. The student has access to a spectrophotometer and an iron (III) ion standard solution to be used as a reference for the analysis. What is the concentration of iron (III) ions in the water sample?

asked Jan 22 in Analytical Chemistry by ErnestinaMus (1.9k points)

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1 answer 118 views

What is the product of the following rearrangement reaction? CH3-C(CH3)2-CH2OH → ?

asked Jan 21 in Organic Chemistry by MollieBalke (2.3k points)

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1 answer 120 views

Identify the number of chiral centers in the molecule shown below and determine whether it is a meso compound or not. Also, draw the enantiomers of the given molecule. H H \ / C=C / \ H OH

asked Jan 21 in Organic Chemistry by BrandiBeer01 (2.4k points)

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1 answer 80 views

A chemistry student wants to study the adsorption behavior of a gas on a solid surface. The Langmuir adsorption isotherm experiment is conducted at temperature T. After analyzing the data, the student finds that the maximum adsorption capacity (at saturation) is q moles of the gas per unit area of the solid surface. The student also determines the value of the Langmuir constant K, which is proportional to the affinity of the gas for the surface. Now, the student needs to determine the fraction of the surface that is covered by the gas molecules at a certain pressure P below the saturation

asked Jan 22 in Surface Chemistry by KaitlynRodri (2.0k points)

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1 answer 119 views

Determine the hybridization state and geometry of the carbon atoms in benzene ring.

asked Jan 21 in Organic Chemistry by LillianaY16 (1.7k points)

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1 answer 80 views

A chemistry student wants to measure the zeta potential of a colloidal solution. The student has chosen the appropriate instrument, but needs to determine the optimal pH range for the solution in order to obtain accurate and meaningful results. What is the recommended method to determine the optimal pH range for measuring the zeta potential of a colloidal solution, and how can the student ensure accurate and reliable measurements using this method?

asked Jan 22 in Surface Chemistry by Precious09K0 (2.0k points)

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1 answer 73 views

A student wants to determine the rate law for the reaction between compound A and compound B. The student measures the initial rate of the reaction under different conditions and records the following data:| Experiment | [A] (M) | [B] (M) | Initial Rate (M/s) ||------------|---------|---------|-------------------|| 1 | 0.1 | 0.1 | 4.22x10^-4 || 2 | 0.2 | 0.1 | 8.44x10^-4 || 3 | 0.1 | 0.2 | 1.69x10^-3 |What is the rate law expression for this reaction in terms of the rate constant, k?

asked Jan 22 in Chemical kinetics by MaryellenGra (2.1k points)

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1 answer 73 views

A student wants to determine the rate constant for the reaction between hydrogen and iodine gases, given the following experimental data:-At t=0, the initial concentration of hydrogen is 0.025 M and iodine is 0.015 M.-10 seconds later, the concentration of hydrogen is 0.018 M and iodine is 0.022 M.-The reaction is second-order with respect to hydrogen, and first-order with respect to iodine.What is the rate constant for the reaction?

asked Jan 22 in Chemical kinetics by TrenaSee705 (1.7k points)

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1 answer 91 views

A 1.00 gram sample of sucrose (C12H22O11) is completely hydrolyzed in solution with excess HCl. If the solution is cooled to room temperature, what is the change in enthalpy ($\Delta H$) for the reaction? The heat capacity of the solution is 4.18 J/(g*K) and the temperature change is -10°C.

asked Jan 22 in ThermoChemistry by Sylvia941924 (1.9k points)

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1 answer 79 views

A galvanic cell consists of a standard hydrogen electrode (SHE) as the cathode and a copper electrode as the anode. The measured potential difference between the two electrodes is 1.23 V. Using Tafel analysis, calculate the anodic and cathodic Tafel slopes for the copper electrode.

asked Jan 22 in ElectroChemistry by ConnieSmothe (2.4k points)

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A zinc rod is being placed in a solution containing 0.1 M of copper (II) ions. Calculate the corrosion potential of the zinc rod in a galvanic couple with a standard hydrogen electrode at 25°C.

asked Jan 22 in ElectroChemistry by MorganMaguir (2.0k points)

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