How do I make the molar masses for (reactant and products) equal? Please, tell me the steps and how to recalculate.

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.

A) equal lines b) parallel lines c) perpendicular lines d) none of the above

What did the experiments of scientists after john dalton reveal about his atomic theory?