Two students mix vinegar and baking soda. They observe bubble forming, the baking soda dissolving, and the vinegar turning cloudy. They infer that chemical change has occurred. Which data support this inference 1. Baking soda dissolved
2. The vinegar turned cloudy
3. Light was given off
4. Bubbles formed

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.