What are substances composed of 2 or more different atoms that are united by bonds of any type?

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

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?

How can parts of a solution be separated by chromatography?