If a certain gas occupies a volume of 20 l when the applied pressure is 10 atm , find the pressure when the gas occupies a volume of 5.0 l .

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

answer; talc and gypsum;