题型:问答题 简答题 用NA表示阿伏加德罗常数的值。下列叙述正确的是[ ]A.5.6g铁粉在1mol氯气中充分燃烧,失去的电子数为0.3NA B.标准状况下,11.2 L的乙烯中含有的共用电子对数为NA C.CO和N2为等电子体,22.4L的CO气体与lmol N2所含的电子数相等 D.100℃时,1 L pH=6纯水中,含OH-数目为10-6NA 查看答案
题型:问答题 简答题 This table is made wood and this kind of paper is made wood, too. [ ]A.of, from B.in, from C.from, of D.from, in 查看答案