氨气的熔点是:-77.75℃,很容易被液化成无色的液体,会分解成氮气和氢气,也容易被固化成雪状固体,是一种无色气体。氨气的密度为:0.7710,H?SO? +2NH? = (NH?)?SO? ,加压就可以使其液化。氨气和硫酸反应氨气和硫酸的反应,(3)当氨气与硫酸摩尔比1:1与2:1之间时:2H?SO? +3NH? = (NH?)?SO? +NH?HSO?,(1)当氨气与硫酸摩尔比≤1:1时:H?SO? + NH? = NH?HSO?,