What is the meaning of volatile liquid?

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma

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