Copper(i) sulfide (cu2s) is synthesized in a reaction described by this chemical equation: 2cu(s) + s(s) → cu2s(s) a ratio of 2: 1 applies to the that enter into the reaction.

Which change to the system wood cause the freely-moving piston to lower?

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.

Liquid nitrogen is kept at a temperature of -320 degrees. when liquid nitrogen is heated it quickly boils and turns into gas. which pair of pictures represent the change caused by adding heat to liquid nitrogen?