如图,两渗透作用装置中,透析袋的体积大小不同,溶液B的透析袋体积大于溶液A的透析袋体积,两装置中玻璃管的直径相同,溶液浓度:溶液A=溶液B>
(6分)32 g铜与150 mL一定浓度的硝酸恰好完全反应,产生NO和NO2混合气体在标准状况下的体积为11.2 L。求(1) NO、NO2的体积各为多少?(2) 此硝酸的浓度为多
将4g氢氧化钠溶于多少水中,才能使每100个水分子溶有一个离子?
下列各句中,没有语病的一句是 A我国正在实施公民旅游素质提升工程,在又一个“黄金周”到来之际,每位游客尤其是出境游客应该意识到自己是祖国
It is several months ______ the whole country started to talk about whether driving after drinking alcohol should be punished. A. since B. before
The hospital described his_______ as “satisfactory” while he felt there was something wrong. A.condition B.situation C.energy D.position