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As O2(l) is cooled at 1 atm, it freeze at 54.5 K to form Solid I. At a lower temperature, Solid I rearranges to Solid II, which has a different crystal structure. Thermal measurements show that delta H for the I --> II phase transition is -535.5 J/mol, and dela S for the same transition is - 17.0 J/K mol. At what temperature are Solids I and II in equilibrium.
Air coming from a painting operation contains 10.0 wt% acetone. The total flow rate of the air/acetone stream is 1.00x103 lbm/min. This stream is sent to a scrubbing system where it is mixed with water.
Explain how the calculated formula of the hydrate would be changed if water from the air is absorbed by the hot dry sample as it cools.
1) Which of these electron configurations has the 4F term symbol for its ground state? p3 d3 d4 f2 f3
0.151 g ofpiperonaldehyde, and 0.80 mL of ethanol, and added 0.10 mL of NaHOsolution (0.60 g/mL), what is the theoretical yield of theresulting chalcone, in grams?
an unknown element forms a yellow ion xo . it forms a precipitate with silver ions. if 48.0 ml of a 0.250 moll solution
The active ingredient in Pepto-Bismol is bismuth subsalicylate, C7H5Bi04. Anslysis of a 1.500-g sample of Pepto-Bismol yeilds 346 mg of bismuth. What percent by mass is bismuth subsalicylate
Sulfonation of benzene has the following mechanism: 1) 2H2SO4......> H3O+ + HSO4- + SO3 fast
An unknown foul smelling hydrocarbon gives the mass spectrum and infrared spectrum with a major fragment at 39, 67, 81, and 95. propose structures for the major fragments
15.0 moles of gas are in a 6.00 L tank at 24.1 degrees C. Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constantsfor methane are a = 2.300 L^2 atm/ mol^2 and b = 0.0430 L/mol
What is the system? What is the surrounding? In what direction does the heat flow? Is the process endothermic or exothermic?
One mole of an ideal gas at 298.15K is expanded fanatically to a final P=1atm next to a constant opposing pressure P=1atm. Compute the final w, q delta U delta H for Cv=7/2 R.
Procedure General flow and logic Temperatures Times Solvents Techniques used to make the products At least one test (your choice) to verify your product the reaction of 2 methyl 2 octene with HBr reacting with heat and CH3Br
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