NA代表阿伏加德罗常数的值,下列说法正确的是 (     ) A.标准状

NA代表阿伏加德罗常数的值,下列说法正确的是 (     )

A.标准状况下,22.4LSO3所含原子数为4NA

B1.0L浓度为1.0 mol/L的一元酸溶液中含有NA个氢离子

C7.8g Na2O2加入过量水中,反应转移的电子数为0.2 NA

D.同温同压下,原子数均为NA的氢气和氦气具有不同的体积

答案

D

相关题目

 With his camera,he kept taking pictures     he did and saw.    A.
 With his camera,he kept taking pictures     he did and saw.    A. where               B. that                   C. of which          D. of what
 如图,直线,直角三角形的顶点在直线上,则的余角等于(
 如图,直线,直角三角形的顶点在直线上,则的余角等于(    ) A.   B.   C.   D.
在下列生成二氧化硫的反应中,反应物中的含硫物质被氧化
在下列生成二氧化硫的反应中,反应物中的含硫物质被氧化的是(    ) A.硫在空气中燃烧                                   B.铜片与浓
为了安全,汽车行驶时驾驶员必须系好安全带.当系好安全
为了安全,汽车行驶时驾驶员必须系好安全带.当系好安全带时,相当于闭合开关,指示灯不亮;未系好安全带时,相当于断开开关,指示灯发光.符
 — Thanks for your help, but can you do me one more favor, please?   
 — Thanks for your help, but can you do me one more favor, please?    — _______, sir. What's it then? A. Just a minute                                    
____ students in this school is about three thousand,and_____of them are girls.
____ students in this school is about three thousand,and_____of them are girls. A.A number of; two thirds        B.The number of; two thirds C.A number of; two third         D.The
More and more people believe that technologies are great for learning. Today, s
More and more people believe that technologies are great for learning. Today, such teaching tools as iPads are used in a lot of courses, including language, history and science. Many teachers are s

最新题目