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How can we design a system that produces surfactants with high purity levels while minimizing waste generation and energy consumption?

asked Mar 1 in Chemical engineering by TheScientist (138k points)

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What is the specific surface area of a sample of activated carbon if it adsorbs 0.45 g of nitrogen gas at 77 K and a pressure of 1 atm, assuming a monolayer of adsorbate and that the nitrogen gas occupies a volume of 22.4 L/mol?

asked Mar 1 in Surface Chemistry by TheScientist (138k points)

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Suppose you are given 500 mL of 0.1 M acetic acid and 0.1 M sodium acetate buffer solution. You add 2 mL of 1 M hydrochloric acid to the buffer solution. Calculate the new pH of the solution and explain how the buffer system resists changes in pH.

asked Mar 1 in Chemical equilibrium by TheScientist (138k points)

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How can we design a system for the production of hydrogen fuel that minimizes the use of non-renewable resources and reduces environmental impact?

asked Mar 1 in Chemical engineering by TheScientist (138k points)

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What is the rate of reaction for the combustion of methane in which 4.7 grams of methane reacts in 3.5 seconds to produce 11.2 grams of water vapor and carbon dioxide gas?

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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How can we design a system for the production of cosmetics that takes into account the desired chemical properties of the final product and the raw materials used, while also ensuring safety and efficient production?

asked Mar 1 in Chemical engineering by TheScientist (138k points)

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Sure. What is the standard enthalpy change for the reaction of mixing 10g of ethyl alcohol (C2H5OH) with 25g of water (H2O) at 25°C, given that the heat evolved is 12.5 kJ?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the molecular orbital diagram and electronic configuration for the H2 molecule using the LCAO-MO (Linear Combination of Atomic Orbitals-Molecular Orbital) method?

asked Mar 1 in Quantum Chemistry by TheScientist (138k points)

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What is the standard enthalpy change for the reaction between 50 mL of 0.1 M HCl and 50 mL of 0.1 M NaOH at 25°C, given that the balanced equation is HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) and the specific heat capacity of the solution is 4.18 J/g K?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the mass of copper deposited on a cathode when a current of 5A is applied for 1 hour in a copper sulfate solution with a concentration of 0.5M? (Molar Mass of Cu: 63.55 g/mol and Faraday's constant: 96,485 C/mol)

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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What is the magnetic moment of a complex formed between iron(III) ion and ethylenediamine ligand (en) with a coordination number of 6?

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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What is the yield of 2,4-dinitrophenol obtained in the preparation of 2,4-dinitrophenol from phenol and nitric acid, given that 10 grams of phenol was used and a 95% yield was achieved?

asked Mar 1 in Chemical synthesis by TheScientist (138k points)

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What is the yield of 2,4-dichloronitrobenzene obtained from the reaction between nitrobenzene and chlorine gas when starting with 10 grams of nitrobenzene and excess chlorine gas, given that the reaction has a theoretical yield of 95%?

asked Mar 1 in Chemical synthesis by TheScientist (138k points)

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What is the yield of 2,4-dichlorobenzoic acid formed when 10 grams of benzoic acid and excess chlorine gas are used in the synthesis, if the actual yield obtained is only 6.5 grams?

asked Mar 1 in Chemical synthesis by TheScientist (138k points)

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What is the pH of a 0.1 M solution of hydrochloric acid when measured using a pH meter? Show the step-by-step calculations and include the proper use of significant figures in your answer.

asked Mar 1 in Analytical Chemistry by TheScientist (138k points)

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What is the pH of a 0.1 M solution of hydrochloric acid (HCl)?

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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How can we design and synthesize a new compound with anti-inflammatory activity that targets a specific biochemical pathway involved in the development of rheumatoid arthritis?

asked Mar 1 in Medicinal Chemistry by TheScientist (138k points)

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The problem is:What is the standard enthalpy change for the dissolution of 5.00 grams of solid magnesium chloride (MgCl2) in 250.0 mL of water at 25 ℃? Given the molar enthalpy of hydration of MgCl2 is -641 kJ/mol.

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the pH of a 0.01 M solution of hydrochloric acid at 25°C, as determined using a pH meter with a precision of ± 0.02 pH units?

asked Mar 1 in Analytical Chemistry by TheScientist (138k points)

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How can we design and implement educational programs that better incorporate chemistry into everyday life, in order to increase students' interest in the subject and promote better understanding of the impact of chemistry on the world around us?

asked Mar 1 in Chemical education by TheScientist (138k points)

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