When a substance changes into a different substance what change has occured

Classify each statement about effective nuclear charge, zeff, as true or false.

50 points! need answer asap. what type of organic compound contains the following functional group? (2 points)

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?