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Consider the non-aqueous cell reaction 2Na(l) + FeCl2(s) 2NaCl(s) + Fe(s) for which E°cell = 2.35 V at 200°C. ?G° at this temperature is: a. 453 kJ. b. -453 kJ. c. 907 kJ. d. -907 kJ. e. None of these choices is correct.
re-establish equilibrium conditions as described: The pressure if the system is increased by decreasing the total volume. a) shift to the left b)shift to the right c) no change
Chemists studied the formation of phosgene by sealing 0.73 atm of carbon monoxide and 0.98 atm of chlorine in a reactor at a certain temperature. The pressure dropped smoothly to 1.32 atm as the system reached equilbrium.
Suppose a solution contains 0.25 M Pb2 and 0.49 M Al3 . Calculate the pH range that would allow Al(OH)3 to precipitate but not Pb(OH)2
When 5.454 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 17.11 grams of CO2 and 7.006 grams of H2O were produced.
A 0.9092-g sample of wheat flour was analyzed by the Kjeldahl procedure. The ammonia formed was distilled into 50.00mL of 0.05063 M HCl; a 7.46-mL back-titration with 0.04917 M NaOH was required. Calculate the percentage of protein in the flour.
The equation for osmotic pressure is = MRT, where ? is the osmotic pressure (in atm), M is the total molarity of solute particles.
Explain how Le Chatelier's Principle affects the extent of the dissociation of acetic acid in a buffer that is 0.10 M acetic acid and 0.10 M acetate ion
When would you do a hot filtration. Why do you wash your crystals after you collect them by filtration
A saturated solution of this substance was made in 0.01 M KlO3. The copper concentration was found to be 0.0012M. Determine the [IO3^-] and the Ksp of the substance.
?Hf0 for the formation of rust (Fe2O3) is -826 kJ/mol. How much energy is involved in the formation of 5 grams of rust.
Calculate the percentage of pyridine ( C5H5N) that forms pyridinium ion, C5H5NH+ , in a 0.10 M aqueous solution of pyridine (Kb = 1.7x10-9).
what is the pH of a buffered system made by dissolving 17.42 g of KH2PO4 and 20.41 g of K2HPO4 in water to give a volume of 200.0 mL?
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