2 Zn + 2HNO2-> 2 ZN(NO2)2 + H2 calculate the mass of 6.9 moles and nitrous acid (HNO2). Show work

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 .

clouds form

solid ice forms on leaves.

water droplets form on grass.