@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 2.140. The rate law of this reaction is Rate = k2.NO2(g) + CO(g) → CO2(g) + NO(g)

@X@user.full_name@X@ @GMU: Which base listed below would be the best to creat a buffer having a pH of 9.6569?

@X@user.full_name@X@ @GMU: The osmotic pressure of a 13.075 mM solution of K3PO4 is 0.966 atm at 14.38 °C. How many ions per formula unit of K3PO4 must there be? The compound may not be completely ionic.

@X@user.full_name@X@ @GMU: The pH of a solution of HBr was 4.477. What was the hydronium ion concentration?

@X@user.full_name@X@ @GMU: Determine the molality of a 9.050 wt % aqueous solution of LiI.

@X@user.full_name@X@ @GMU: What is the cell voltage for the following cell?3Sn2+(aq) + 2Cr(s) → 3Sn(s) + 2Cr3+(aq) ΔGo = -347.346 kJ

@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 0.1852. 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: Which base listed below would be the best to creat a buffer having a pH of 7.7461?

@X@user.full_name@X@ @GMU: What is the pH of 4.42e-4 M HNO3 ?

@X@user.full_name@X@ @GMU: What is the temperature at which the reaction below becomes spontaneous, if the standard entropies of reactants and products at 25oC are So (C(gr)) = 5.74 J/mol*K, So(H2(g)) = 130.68 J/mol*K, and So (C6H6(g)) = 269.2000J/mol*K and the heat of formation of C6H6(g)) is 82.9300 kJ/mol?C6H6(g) → 6C(gr) + 3H2(g)