Oxygen gas can be produced by decomposing potassium chlorate (kclo3) using the reaction below. if 125g of kclo3 is heated, what mass of oxygen gas is produced?

2kclo3(s) --> 2kcl(s) + 3 o2 (g)

Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.