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In the laboratory a student named Georgia weighed 5.95 g of an unknown solid mixture containing benzoic acid, copper (II) sulfate, and sand. She added 15 mL of acetone to her sample and dissolved one of the components of the mixture.
Originally, a system contains only HI at a pressure of 1.00 atm at 520 degrees celsius. The equilibrium partial pressure of H2 is found to be 0.10 atm. Calculate Kp. 2HI(g) H2(g)+I2(g)
3 moles of carbon dioxide gas expands reversibly in a piston-container from 20 L to 40 L in an isothermal process at 400 K. Calculate work, heat, change in internal energy and change in enthalpy, considering van der Waals behaviour. [a = 3.59 atm ..
What would be the pH of a solution prepared by combining equal quantities of NaH2PO4 and Na2HPO4? Explain. 2. Sufficient strong acid is added to a solution containing
The unknown has peaks at 2818.38, 2716.12, 1682.14, 1622.34, 1491.16,1450.65, 1359.99, 1304.05, 1188.30,1014.69, 925.95,883.51, 758.19, 698.39.
when heated lithium reacts with nitrogen to form lithium nitride. what is the percent yield of the reaction if 13.9 of
Calculate the equilibrium concentrations of boric acid (H3BO3) and the borate anion (H2BO3-) in pH 8 seawater, given a total boron concentration (H3BO3 + H2BO3-)
Determine how long will it take for the concentration to decrease to 0.13 mol/L express your answer in seconds.
Subtilisin (Mr 27600) is a bacterial protease that can catalyze hydrolysis of certain amino acid esters and amides. Subtilisin does have a problem, in that it becomes inactivated by oxidation of a methionine Met-222. Subtilisin mutant with Cys rep..
Calculate the pH of a 1.00 L solution which is made up of 0.046 mol acetic acid and 0.026 mol sodium acetate.
What is the mass of platinum required to solidify all the gold? What is the change in entropy of the system? Cp(Pt, s) = 25.86J/mol*K ?H?fus(Au, s l) = 12550J/mol
calculate the energy needed to raise the temperature of 180.0g of water from 10.0 C to 40.0 C. The molar heat capacity for water is 75.3 J/k*mol
Construct a delta H and delta S table, including the four possibilities associated with the two possible signs for each of delta H and delta S. Discuss the resulting sign of delta G and the spontaneity of the process.
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