Need help with Gen chem quiz questions!!

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I am running out of time, so if any one can help give me some formulas or something, that would be great. Thanks.

1) K of concentration= 0.0198 @ 721 K

2HI (G) ---> H2(g) + I2(g)

In a particular experiment, the partial pressures of and at equilibrium are 0.710- and 0.888- atm, respectively. The partial pressure of HI is __________ atm.

a. 1.98
b. 0.389
c. 5.64
d. 7.87
e. 0.125


AND
In the coal-gasification process, carbon monoxide is converted to carbon dioxide via the following reaction:



2) In an experiment, 0.35 mol of CO and 0.40 mol of H2O were placed in a 1.00-L reaction vessel. At equilibrium, there were 0.19 mol of CO remaining. Keq at the temperature of the experiment is ___________.

CO (G) + H20 (G)---->CO2 (G) + H2 (G)

a. 0.75
b. 5.47
c. 1.0
d. 1.78
e. 0.56