2008年9月曝光的引起国人共愤的“结石宝宝”事件,与婴儿服用含三聚氰胺的奶粉有关.三聚氰胺俗称“蛋白精”,化学式为C 3 H 6 N 6 ,将它用作食品添加剂中可提高食品中含氮量的检测值.请你计算: (1)三聚氰胺中碳元素与氢元素的质量比为______. (2)126g三聚氰胺中氮元素的质量为______.
【简答题】Every school has a notice board. Let’s see what is on the notice board of an America school. School Policy(政策) u Fighting, saying bad words and all other bad behavior will not be allowed. u Do ...