What is another term for air movement caused by differences in air pressure

Describe the interaction that occurs between two objects with the same electrical charge.

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?