How can mass and energy behave in an open system

Air can be considered a mixture. which statement does not explain why?

Consider this reaction taking place in a closed 2 liter container: 2so2(g) + o2(g) → 2so3(g) if the volume of the container is decreased to 1 liter, what will happen to the equilibrium of the reaction? it will shift left. it will shift right. it will remain constant it will decrease by half

Dalton completing an investigation in the science lab he observes that a sample of liquid turns to gas at 135c what’s this temperature called?