Consider a liquid in a piston apparatus that is at equilibrium with the vapor phase. in which direction should the piston be moved to decrease the number of molecules in the liquid phase?

the piston should be in the upmost position to allow room for material to expand, thus be in vapor state, when a gas is compressed, it liquefies, and when dealing with a piston, much like in an auto combustion engine, the piston moves up and allows oxygen to mix with vapor and explode, thus powering further movement of pistons.

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

Wut scale? and wut he said.