下表是几种弱酸常温下的电离平衡常数: CH3COOHH2CO3H2SH3PO4 1.8×10-5K1=4.3×10-7 K2=5.6×10-11K1=9.1×10-8 K2=1.1×10-12K1=7.5×10-3 K2=6.2×10-8 K3=2.2
阅读下面文章,完成1—3题。 【甲】“吹面不寒杨柳风”,不错的,像母亲的手抚摸着你。风里带来些新翻的泥土的气息,A (带、含、混)着
如图所示程序框图输出的结果是,则判断框内应填的条件是( ) . . . .
化学科学的发展为人类提供了更多的生活、生产资料。下面做法利用了化学变化的是 A.工业上分离液态空气得到氧气、氮气 B.工匠熔化玻璃吹
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Friends are important to children.Research shows that children who have no friends can suffer from difficulties later in life.Friendship provides children with more than just fun.In making frien
在一密闭容器中,反应 aA(g)bB(g)达平衡后,保持温度不变,将容器体积增加一倍,当达到新的平衡时,A的浓度变为原来的60%,则A.平衡向正反应
Could you tell me _______ ? A. What does he do? B. How much it costs to fly to Hainan? C. What is he crying so sadly? D. Whether has he arrived?