Consider the reaction: 2 H2S(g) ⇌ 2 H2(g) + S2(g) Kc = 1.67 x 10−7 at 800°C
The reaction vessel initially contains [H2S] = 0.0250 M. Find the equilibrium concentrations of the reactants and products at this temperature.

How to solve 4 nh3(g) + 5 o2(g) > 4 no(g) + 6 h2o(g) in chemistry

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?