1. The problem statement, all variables and given/known data consider the following reaction: 2H2O(i) <-> 2H2(g) + O2(g) kc=7.3*10^-18 at 1000oC The initial concentration of water in a reaction vessel is 0.055 mol/L. What is the equilibrium concentration of H2(g) at 1000oC? 2. Relevant equations h20 h2 02 I 0.055 0 0 C -2x +2x +x E0.055-2x 2x x 3. The attempt at a solution The equation I got is: -4x^3+2.92*(10^-17) x^2 -1.606*(10^-18) x +2.20825*10^-20 =0 How do I solve it if it is a cubic function?