1. A sample of a hydrocarbon is burned completely and produces 22 g of CO2 and 27.0 g of H2O. The
empirical formula of the hydrocarbon is:

Asubstance is held in an open container. its particles move past one another at random speeds but do not leave the container. heat is removed from the system, and the particles slow down. when enough heat is removed, the particles no longer have enough speed to overcome the weak attractive forces between them. when this happens, the substance enters its solid state. the process described above is known as .