The sinking of ocean crust back into the mantle when it meets continental crust is (convergent / sea-floor spreading / divergent boundaries / subduction), and this occurs at (ocean trenches / mid-ocean ridges / plate centers / mountain ranges).

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?