What is the modern atomic model sometimes called?

altitude, density, pressure

air gets less dense the higher the altitude and also the air pressure is less as altitude rises.

> 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.