Ever since learning about atoms and molecules as a child I have envisioned substances (air, water, metal, etc) as being composed of discrete individual atoms and molecules. Today it occurred to me that might be an oversimplification, especially for gasses in which molecules are free to move around. An electron being fired through a double slit setup goes through one slit or the other only when you look at it. When you don't it's position is in superposition between the 2. A molecule may be a discrete object with a specific position when you look at it and study it, but when it is one anonymous molecule of O2 in room full of air it's position becomes a superposition of all possible positions. In this case the range of possible positions would become much larger then the size of any 1 molecule or the distance between them, thus blurring the substance into something continuous and homogeneous. I'm not sure what that would mean though. I am at a loss to think of any experiment which would demonstrate a continuous and homogeneous nature of a gas. Any experiment capable of distinguishing individual molecules would collapse the superposition and result in individual molecules being observed. Has this idea of substance homogeneity due to quantum superposition been explored? If so, what was the result?