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在一般化学教科书上,每讲到混和物与化合物时,常以铁粉和硫粉的混和或化合为例,来说明这二个基本概念。当这两种单质混和后,几乎看不出它们的微粒,好像是均一的。但铁粉可以被磁石吸引,而硫粉剩下不动,铁与硫都保持着原有的本性。这样,我们叫它们为混和物。如果铁和硫的量以7:4的比例混和,加热,变成一种新物质—硫化亚铁。其中的铁粉,不能再被磁石吸引而把它们分开,就是铁和硫都失去原有的本性,这样,我们叫它做化合物。从这里可以说明:同是某几种物质,
In general chemistry textbooks, each speaks of mixtures and compounds, often with iron powder and sulfur powder mixture or compound as an example to illustrate these two basic concepts. When these two elements are mixed, they are barely visible as if they are uniform. However, the iron powder can be attracted by the magnet, while the sulfur powder remains intact, both iron and sulfur maintain the original nature. In this way, we call them mixtures. If the amount of iron and sulfur in the ratio of 7: 4 mixing, heating, into a new material - ferrous sulfide. One of the iron powder, can no longer be attracted to the magnet to separate them, that is, iron and sulfur lose their original nature, so that we call it a compound. From here you can explain: the same is a certain type of material,