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18.6 grams of a solute with moecular mass of 8940 grams are dissolved in enough water to make 1.00 dm^3 of solution at 25 ^0C. What is the osmotic pressure of the solution?
Molar mass from volumetric data, 2.64g of an organic base, isolated from a shrub in the mountains of Peru was dissolved in 100mL of water. 25.0mL of this solution required 27.5mL of 0.250mL HCL for complete neutralization
A metal object with a mass of 19g is heated to 96c, then transferred to a calorimeter containing 75g of water at 18c. The water and teh metal object reach a final temperature of 22c.
A 33.0-g sample of an alloy at 93.0°C is placed into 258 g of water at 22.0°C in an insulated coffee cup. Assume that no heat is absorbed by the cup. If the final temperature of the system is 31.1°C
In May 1990 the French TGV train traveled the distance from Paris to Lille, France (127 miles) in .819 hours. What was the speed of the TGV in m/s?
The pH of the solution at the equivalence point, The pH of the solution after 40.0 mL of HCl are added.
Rank SCl2, PCl3, and SiCl4 in order of increasing ionic character of their bonds. Use polar arrows to indicate the bond polarity of each bond.
compute the partition coefficient for the compound between C 6 H 14 and H 2 O (Kphexane/water).
What volume of ammonia at 25 °C and 1.5 atm pressure is needed to produce 500 g of urea?
The mass of calcium fluoride that results from the reaction of 3.00 grams of calcium and 2.00 grams of fluorine is 4.02 grams. What is the percent yield?
Describe the preparation of 12 mL of a 0.050 M solution of each of the halogens, using the reactions in the preceding question. Available to you are solid Ca(OCl)2
The compounds below cannot be identifed from IR and H NMR spectra alone. Explain. Suggest how other types of spectroscopy might be useful in solving the structure
What is the mole fraction of pentane in a pentane-hexane solution that has a vapour pressure of 308 torr at 25 oC? (At 25 oC the vapour pressure of pure pentane is 511 torr and that of hexane is 150 torr.)
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