When 6. 25 grams of pure iron are allowed to react with oxygen, a black oxide forms. If the product weighs 8. 15 g, what is the empirical formula of the oxide?.

particle   p is an electron and particle q is a neutron

> 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.