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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 AgnesXyg5256 (2.3k points)

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A chemistry student needs to prepare a buffer solution with a pH of 5.2 using acetic acid (CH3COOH) and sodium acetate (NaC2H3O2). The student has 10 mL of 0.15 M acetic acid and 15 mL of 0.20 M sodium acetate. What volume of water should the student add to make the desired buffer solution?

asked Jan 22 in Chemical reactions by FranziskaEve (2.3k points)

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A student wants to determine the power output of a galvanic cell containing a zinc electrode and a copper electrode. The zinc electrode has a surface area of 20 cm² and is coated with a layer of zinc which weighs 0.5 grams. The copper electrode has a surface area of 15 cm² and is coated with a layer of copper that weighs 0.4 grams. The cell operates at standard conditions (25°C and 1 atm), and the electrolyte is a solution of 1 M copper sulfate and 1 M zinc sulfate. Calculate the power output of the electrochemical cell.

asked Jan 22 in ElectroChemistry by AnnettaCampb (2.6k points)

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As a Chemistry student, analyze the environmental impact of an industrial project that involves the production of fertilizers, and suggest ways to mitigate its negative impact on the environment.

asked Jan 22 in Environmental Chemistry by CharleyPrior (2.0k points)

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A metal electrode immersed in a solution is used to convert a chemical reaction into an electric current. The electrode potential is measured as the voltage difference between the metal and the solution. The cathodic and anodic Tafel slopes are then calculated in order to determine the rate of the chemical reaction occurring at the electrode. Given a metal electrode immersed in a 0.1 M solution of AgNO3, the cathodic and anodic Tafel slopes are determined to be 120 mV/decade and 110 mV/decade, respectively. Calculate the exchange current density for the reaction occurring at the electro

asked Jan 22 in ElectroChemistry by TomokoSorian (2.5k points)

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What is the balanced equation for the oxidation of ethanol to ethanoic acid? Include the oxidation state of each carbon atom before and after the reaction.

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

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Balance the following chemical equation: Fe + O2 -> Fe2O3

asked Jan 22 in Chemical reactions by RafaelBarrow (2.3k points)

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Balance the chemical equation for the reaction between potassium permanganate (KMnO4) and sodium sulfite (Na2SO3) in acidic solution.

asked Jan 22 in Chemical reactions by JordanHering (2.1k points)

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A student wishes to determine the power output of an electrochemical cell that utilizes a half-reaction of copper oxide reducing to copper and a half-reaction of zinc oxidizing to zinc ions. The initial concentrations of the copper and zinc ions in the cell are 1.00 M and 0.10 M, respectively. The cell operates for 60 minutes at a constant rate of 0.200 A. Given that the standard cell potential is 1.10 V, calculate the power output of the electrochemical cell.

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

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A solution of 0.1 M AgNO3 was electrolyzed using a current of 0.5 A for 150 seconds. If 0.15 g of silver was deposited, what is the value of the Faraday constant?

asked Jan 22 in ElectroChemistry by RyderShupe77 (2.3k points)

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A container contains 2 moles of a gas at a pressure of 8 atm and a temperature of 300 K. Calculate the volume of the gas in each of the following thermodynamic ensembles: microcanonical, canonical, and grand canonical ensembles.

asked Jan 22 in Physical Chemistry by BrianneWoodw (1.8k points)

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1 answer 60 views

Balance the chemical equation for the combustion reaction of propane (C3H8) with oxygen gas to produce carbon dioxide gas and water vapor.

asked Jan 22 in Chemical reactions by LuisHuntsman (2.1k points)

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1 answer 61 views

A student wants to know how the equilibrium position of a weak acid such as acetic acid would be affected if they add more acetate ion. If the initial concentration of acetic acid is 0.1 M and initial concentration of acetate ion is 0.05 M. What will be the new concentration of acetate ion necessary to increase the pH of the solution by 0.5 units?

asked Jan 22 in Chemical equilibrium by BarbraBelang (2.0k points)

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Assuming the volume of a container at equilibrium is 2 L, what is the new equilibrium concentration of NOCl if the volume is changed to 1 L, given that the initial concentration of NOCl is 0.10 M and the equilibrium constant (Kc) is 0.054?

asked Jan 22 in Chemical equilibrium by Marietta86T (1.9k points)

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Assuming that the concentration of Cu2+ ions in a solution is 0.25 M, the concentration of Ag+ ions in another solution is 0.50 M, and the standard reduction potential of Cu2+(aq) + 2e- → Cu(s) is +0.34 V and that of Ag+(aq) + e- → Ag(s) is +0.80 V, calculate the current density when the two solutions are separated by a salt bridge and connected by a wire.

asked Jan 22 in ElectroChemistry by GreggTimperl (2.3k points)

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A chemist mixes 0.1 mol of hydrogen (H2) with 0.2 mol of nitrogen (N2) in a 2 L flask at 400°C. The reaction H2(g) + N2(g) ⇌ 2NH3(g) establishes equilibrium. Calculate the equilibrium concentrations of hydrogen, nitrogen, and ammonia if the Kc value of the reaction at this temperature is 1.5 x 10^-2.

asked Jan 22 in Chemical equilibrium by Ashleigh66X2 (2.6k points)

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A chemistry student needs to determine the equilibrium concentrations of reactants and products for the following reaction:2 NOCl (g) ⇌ 2 NO (g) + Cl2 (g)The initial concentration of NOCl is 0.50 M and the equilibrium constant, Kc = 4.68 x 10^-3. What are the equilibrium concentrations of NO and Cl2?

asked Jan 22 in Chemical equilibrium by JonasOql0066 (2.5k points)

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A student wants to determine the enthalpy of combustion of octane. They measured the temperature change of 200 mL of water in a calorimeter when 1.50 grams of octane was burned completely. The initial temperature of the water was 25.0 °C and it reached a maximum of 45.0 °C. What is the enthalpy of combustion of octane?

asked Jan 22 in ThermoChemistry by EvaO88610769 (2.4k points)

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A student reacted 10.0 grams of NaOH with 12.0 grams of HCl to produce NaCl and H2O. The balanced chemical equation for the reaction is as follows:NaOH + HCl → NaCl + H2OIf the expected yield of NaCl is 9.0 grams, what is the percent yield of the reaction?

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

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A 50 mL solution of 0.1 M Cu(NO3)2 was electrolyzed for 20 minutes. During this time, a current of 0.5 A was passed through the solution. What is the final concentration of Cu2+ ions in the solution after the electrolysis?

asked Jan 22 in ElectroChemistry by LizaSwenson (2.2k points)

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