What property of air allows it to flow down to the floor?

I am not sure about my answer, but I think that it's density allows it to fall to the ground/floor.

*tilts head* sounds more like a statement

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.