Equilibrium constant caluclations

[EriMizuguchi2K]

I was a little confused on how to do this problem, so if someone could help me work through it I would really appreciate it!

A researcher fills a 1.00 L reaction vessel with 1.84 x 10-4 mol of BrCl gas and heats it to 500 K. At equilibrium, only 18.3 % of the BrCl gas remains. Calculate the equilibrium constant, assuming the following reaction is taking place. 2BrCl(g) ⇌ Br2 (g) + Cl2(g)

[carterwink2K]

The simplest way to do this problem is to set up an ICE table. If only 18.3% of the gas is left, then the rest was turned into the products. Using that, we can identify the changes in the ICE table and can fill it out completely (no variables). Then, because we know all of the concentrations at equilibrium, we can calculate the equilibrium constant.