At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3.

At this temperature, 0.300 mol of H2 and 0.300 mol of I2 were placed in a 1.00-L container to react. What concentration of HI is present at equilibrium?

2 answers

I've done two of this type for you; try this on your own and see what you can do. Post your work if you need further assistance.
.653