H3BO3和H3PO3化学式相似,为什么H3BO3为一元酸而H3PO3为二元酸?
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ⅤA族元素都可以形成三氯化物,P,As,Sb还可形成五氯化物,而N和Bi却不能形成五氯化物,为什么?
无色晶体A易溶于水。将A在煤气灯上加热得到黄色固体B和棕色气体C。B溶于硝酸后又得A水溶液。碱性条件下A与次氯
What factors are responsible for the difference in the properties of CO2and SiO2?
In the preparation of P4O6, why is a mixture of nitrogen and oxygen used rather than pure oxygen?