单选题:设nA为阿伏伽德罗常数的数值,下列说法正确的是 题目分类:理综 题目类型:单选题 查看权限:VIP 题目内容: 设nA为阿伏伽德罗常数的数值,下列说法正确的是 A.23g Na 与足量H2O反应完全后可生成nA个H2分子 B.1 molCu和足量热浓硫酸反应可生成nA个SO3分子 C.标准状况下,22.4LN2和H2混合气中含nA个原子 D.3mol单质Fe完全转变为Fe3O4,失去8nA个电子 参考答案: 答案解析:
What is the probable relationship between the speakers? What is the probable relationship between the speakers?A.Salesperson and custome 分类:理综 题型:单选题 查看答案
What is the woman's opinion about the course? What is the woman's opinion about the course?A.Too hard. B.Worth taking. C.Very 分类:理综 题型:单选题 查看答案