A chemical reaction occurs with calcium carbonate, CaCO3, and results in the production of two simpler compounds. Caco,
? 9
Cao +
28.00 g
co2
21.97 g
What should the mass of calcium carbonate, CaCO3, be BEFORE the reaction?

the temperature of the gas, in k, not celsius.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.