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Determine the equilibrium constant at room temperature for the reaction of hydrogen gas and iodine gas to form hydrogen iodide gas, if the initial concentrations of hydrogen and iodine gases were 0.50 M and 0.25 M, respectively, and the equilibrium concentration of hydrogen iodide gas is 0.40 M.

asked Feb 4 in Chemical equilibrium by ReeceHodges (750 points)

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Design a strategy to protect the alcohol functional group in a molecule containing both a primary amine and a carboxylic acid group, to prevent unwanted reactions during organic synthesis.

asked Feb 4 in Organic Chemistry by KeriReich33 (230 points)

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Determine the bond order and bond length of the nitrogen-oxygen bond in the nitrate ion (NO3-).

asked Feb 4 in Inorganic Chemistry by MabelNesmith (290 points)

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Design a multi-step synthesis of 2-phenylbutanoic acid starting from benzene and any other necessary reagents, using retrosynthesis to plan the reaction steps. Include reaction mechanisms, reagents, and conditions for each step.

asked Feb 4 in Organic Chemistry by RafaelaEngel (370 points)

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Design a heat exchanger for the production of sulfuric acid at a flow rate of 1000 liters per hour. The inlet temperature of the acid is 80°C and the desired outlet temperature is 30°C. The cooling water is available at 20°C and has a flow rate of 2000 liters per hour. Determine the required heat transfer area of the heat exchanger assuming the overall heat transfer coefficient is 800 W/(m²K). What material would you recommend for the heat exchanger tubes and why?

asked Feb 4 in Chemical engineering by MaiPorter008 (510 points)

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Determine the equilibrium constant, Kc, for the following reaction: N2(g) + O2(g) ⇌ 2NO(g) If the initial concentration of N2 is 0.50 M, O2 is 0.40 M, and NO is 0.10 M at equilibrium, what is the value of Kc?

asked Feb 4 in Chemical equilibrium by PatriceBayle (390 points)

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1 answer 20 views

How can chemistry educators effectively advocate for more funding to support quality chemistry education in schools with limited resources?

asked Feb 4 in Chemical education by RosellaThibo (350 points)

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How can chemistry educators provide adequate support for students with learning disabilities in the classroom to ensure their success in understanding and applying complex chemistry concepts?

asked Feb 4 in Chemical education by MilanKight97 (150 points)

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Design a distillation column to separate a mixture that contains 40% ethanol and 60% water by weight with a desired ethanol purity of 95%. The feed rate of the mixture is 100 kg/hr and the reflux ratio is 3:1. Determine the number of theoretical plates required and the height of the column. Assume that the total condenser and reboiler are both at 100°C and that the distillate leaving the column is 90% liquid and 10% vapor.

asked Feb 4 in Chemical engineering by VickieDevito (470 points)

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Design a distillation column to separate a mixture of ethanol and water when the initial mixture contains 30% ethanol and 70% water. The desired final concentration of ethanol in the distilled product is 95%. The distillation column is 14 trays high and the reflux ratio is set at 2.2. Calculate the minimum number of theoretical trays required in the distillation column and provide the final composition of the ehtanol product stream.

asked Feb 4 in Chemical engineering by RigobertoWoo (290 points)

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Design a polymerization reaction to produce a high-density polyethylene (HDPE) with a molecular weight of 1 million grams per mole using ethylene as the monomer and a Ziegler-Natta catalyst system. Calculate the theoretical yield of the reaction and explain the factors that may affect the percent yield.

asked Feb 4 in Organic Chemistry by ACRBianca429 (310 points)

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1 answer 43 views

Design a polymer-based sensor that can measure the pH of a solution. Provide details on the properties of the polymer, the mechanism of sensing and the range of pH measurements that the sensor can detect.

asked Feb 4 in Polymer Chemistry by LaceySimpkin (270 points)

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1 answer 24 views

Develop a polymer-based composite that can withstand extreme heat and high stress conditions, making it suitable for use in turbine engine components in aerospace applications.

asked Feb 4 in Polymer Chemistry by KKETonja8974 (350 points)

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Determine the standard enthalpy change for the following reaction: 2 Fe (s) + 3/2 O2 (g) → Fe2O3 (s) Given the following data: - ΔHf° of Fe2O3 (s) = -826 kJ/mol - ΔHf° of O2 (g) = 0 kJ/mol - The heat capacity of the calorimeter is 135 J/°C Assume that the reaction takes place at constant pressure and that the heat absorbed by the calorimeter is negligible.

asked Feb 4 in Chemical thermodynamics by MollieMaddox (270 points)

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Design a distillation column to separate a mixture of ethanol and water using McCabe-Thiele Method. The feed contains 50 mol% ethanol and the distillate should have a purity of at least 95 mol% ethanol. The reflux ratio is 2.5 and the boil-up ratio is 1.5. The column must have 10 theoretical plates. Determine the number of trays above the feed and below the feed and the corresponding compositions of the distillate and bottoms.

asked Feb 4 in Chemical engineering by ElkeJoris284 (190 points)

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Design a process for the purification of crude acetone obtained from the industrial production of phenol to obtain at least 99% pure acetone. Take into account the initial impurities in the crude acetone and suggest suitable separation techniques to remove them. Specify the equipment and operating conditions required for your proposed purification process.

asked Feb 4 in Chemical engineering by JasperHatter (410 points)

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1 answer 23 views

Determine the standard enthalpy of formation for methane (CH4) using the combustion reactions of methane and hydrogen gas (H2). Given the standard enthalpy of combustion for CH4 is -890.3 kJ/mol and the standard enthalpy of formation for H2O is -285.8 kJ/mol.

asked Feb 4 in Chemical thermodynamics by IndiraJarman (340 points)

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1 answer 24 views

Determine the enthalpy of desorption for carbon dioxide from activated charcoal at 25°C. Given: the equilibrium pressure of CO2 is 0.1 atm and the mass of charcoal used is 2.5 g.

asked Feb 4 in ThermoChemistry by Freddie0907 (330 points)

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1 answer 41 views

Design a novel polymer-based drug delivery system for targeted cancer therapy that ensures controlled and sustained drug release with minimal adverse effects on healthy cells. Consider the physicochemical properties of the drug and the polymer, as well as their interactions and biocompatibility. Provide a detailed explanation of the mechanism of drug release and the potential benefits of the proposed system.

asked Feb 4 in Polymer Chemistry by JarrodKnorr7 (430 points)

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Design a method of transportation and storage for flammable and toxic chemicals that minimizes the risk of leakage, spillage, fire or explosion, while keeping in mind the potential impacts on human health and the environment. Consider different factors such as the type of chemicals, routes of transportation, type of containers, safety measures, regulations, and emergency response plans.

asked Feb 4 in Chemical engineering by AurelioR7069 (470 points)

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