A mixture of 1374g of h2 and 7031g of br2 is heated in a

Question

A mixture of 1.374g of H2 and 70.31g of Br2 is heated in a 2.00 L vessel at 700 K. These substances react as follows: H2(g) + Br2(g) <---> 2HBr(g)

At equilibrium the vessel is found to contain 0.566g of H2.

a. Calculate the equilibrium concentrations of H2, Br2 and HBr.

b. Calculate Kc.