(5分)有X、Y、Z三种元素(1)X、Y、Z的三种单质在常温下均为气体

(5分)有X、Y、Z三种元素

(1)X、Y、Z的三种单质在常温下均为气体

(2)X单质可在Z单质中燃烧,生成物XZ,其火焰为苍白色;

(3)XZ极易溶于水,电离出X+和Z离子,水溶液可使湿润的蓝色石蕊试纸变红;

(4)2moLX可与1molY化合生成2molX2Y,X2Y常温下为液态

(5)Z单质黄绿色,溶于X2Y中,溶液有漂白作用,

则三种元素符号依次是X              Y            Z           ,

它们化合物的化学式XZ           X2Y               

 

答案

X: H  Y:  O   Z:  Cl   ,XZ: HCl    X2Y : H2O

解析:略

 

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