What is true if a liquid and a gas are in equilibrium? A. Liquid molecules forming a gas and gas molecules forming a
liquid are equal in number.
B. The number of liquid molecules and the number of gas molecules
vary
C. Liquid molecules are continually forming to replace escaping gas
molecules.
D. The liquid molecules stay liquid, and the gas molecules stay gas.

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?