H2(g) + I2(g) = 2HI(g)

I am told to calculate the Molarity for I2.. I am told the volume of the flask is 250mL and there are 0.90molH2 and 0.70mol HI. I am given the equillibrium constant K which is equal to 8.84.

I know this is a problem that I am likely going to have to use an ICE chart for, as well as the quadratic formula. However, I get very confused once I get my values from the ICE chart and where to go from there.