chemistry problems- help?

[Mel S]

1. 2 NOBr (g) <-> 2 NO (g) + Br2 (g); at 298 K, the equilivrium constant, Kp, is 9.17x10^-3.
a. if the temperature in the container is lowered to 100K and the overall pressure is observed to increase, what can be said about the enthalpy of this reaction? briefly explain.
bc. if the volume of the container were increased, how would the equilibrium position shift? briefly explain.
c. if the equilibrium partial pressure of NO is 0.0459 atm and that of NOBr is 0.0468 atm, calculate the partial pressure of BR2 at equilibrium.

2. given the following solubility-product constants measured at 25C.
BeSO4 1.2x10^-7
NH4SO4 6.1x10^-3
Fe2(SO4)3 3.7x10^-6
a. rank the solids in order from least to most soluble
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b. if saturated solutions are created of each of the above solids, which will have the lowest concentration of hydroxide ions?