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@X@user.full_name@X@ @GMU: The vapor pressure of benzene, C6H6, (l) at 314.9 K is 212.1 mm Hg. What is the heat of vaporization if its normal boiling point is 353.3 K?

@X@user.full_name@X@ @GMU: By how much would the rate of reaction (see below) change if the concentration of Cl2 increased by a factor of 1.981. The rate law of this reaction is Rate = k[CHCl3][Cl2]1/2.CHCl3(g) + Cl2(g) → CCl4(g) + HCl(g)

@X@user.full_name@X@ @GMU: When 0.1728 g of lysine was dissolved in 107.9 mL of water, the osmotic pressure at 33.71°C was 0.2762 atm. What is the formula mass of this compound?

@X@user.full_name@X@ @GMU: What is the pOH of a 0.1203 M H2CO3 ? See reaction belowH2CO3 + H2O → HCO-3 + H3O+ Ka = 4.300×10-7

@X@user.full_name@X@ @GMU: Uranium -238 decays in a series of steps to Pb-206. When the material is very old, one can treat the kinetics as a decay directly to Pb and the ratio of these two can be treated as a measure of the age of a rock. A rock containing 238U and 206Pb was examined to determine its approximate age. The molar ratio of 206Pb to 238U was 0.1598. Assuming no lead was originally present and that all lead formed remained in the rock, what is the age of the rock (in years)? The half-life of 238U is 4.50e9 yr.

@X@user.full_name@X@ @GMU: For a galvanic cell, the anode has a ____ sign and is the site of ____.

@X@user.full_name@X@ @GMU: The osmotic pressure of an unknown solution is 321.685 mm Hg at 26.77 °C. Which of the solutions below is the most likely one? Assume any salt is completely ionic!

@X@user.full_name@X@ @GMU: After 63.431 seconds 66.63 % of A had not reacted. What is the first order rate constant?

@X@user.full_name@X@ @GMU: By how much would the rate of reaction (see below) change if the concentration of CO increased by a factor of 2.304. The rate law of this reaction is Rate = k[NO2]2.NO2(g) + CO(g) → CO2(g) + NO(g)

@X@user.full_name@X@ @GMU: What is the solubility in g/L of SO2 at a partial pressure of 629.1 torr, if the solubility at a partial pressure of 495.1 torr is 61.61 g/L?