Which property describes a mixture? Select three options. It can be separated by physical methods. It has a single chemical composition. It can appear different from different sources. It cannot be described by a chemical symbol or formula. It cannot have more than one state of matter.

How is electrolysis most commonly used to produce an energy source? a - splitting water molecules produces oxygen, which organisms breathe to fuel their bodies. b - splitting water molecules produces hydrogen gas, which is used to power machines through hydrogen fuel cells. c - splitting carbon dioxide molecules produces coal, a form of carbon that can be burned to produce heat. d - splitting carbon dioxide molecules produces natural gas, which can be burned to generate electricity in power plants.