在 0.1mol·L-1 CH3COOH溶液中存在如下电离平衡:CH3COOH CH3COO-+H+,对于该平衡,下列叙述中,正确的是( )A.加入水时,平衡向逆反应方向移动
将氯化钠、氯化铝、氯化亚铁、氯化铁、氯化镁五种溶液,通过一步实验就能加以区别,并且只用一种试剂,这种试剂是( ) A.KSCN B.BaCl2
Scientists say they have found key clues(线索)into how long we will live. One of them is a firm __21___. British researchers believe a firm strong handshake is not just a __22___ of confidence b
To fully understand Shakespeare’s works, we must read not only between the lines of his drama, but sometimes __________ the lines. A. within B. beside
学习了内能及能量的转化和守恒后,同学们在一起梳理知识时交流了以下想法,你认为其中正确的是 A.做功改变物体的内能是不同形式的能的相互
甲苯分子中的氢原子有1个被氯原子取代后,可能形成的同分异构体共( ) A.3种 B.4种 C.5种