所以镁的密度是贴的四分之一。

So, this is about a quarter of the density of steel.

youdao

黑药和镁的混合物具有离析的倾向。

Mixture of black powder and magnesium has a tendency to segregate.

youdao

它含有一百万吨镁，一百万吨，那比我们每年世界各地，生产镁的工厂的总产量还要多。

It contains an million tons of magnesium, 1,000,000 tons, which is more than has ever been produced in one year by all the magnesium plants in the world.

youdao

OK, so now the question is, how do we know the first place that this is a suitable reductant?

好的，现在的问题是，我们如何能知道第一步中,镁是一个合适的还原剂？

麻省理工公开课 - 固态化学导论课程节选

So, if I look at the mole ratios on the reaction over there I'm going to find that I'll be able to consume, at most, 1,029 over two, right?

所以，注意反应的摩尔比,我们会发现，1029摩尔的镁能被消耗，对吧？

麻省理工公开课 - 固态化学导论课程节选

So, I went to the library and I looked up Advances in Molten Salt Chemistry volume six because there's an article in there about the chemistry and electrochemistry of magnesium production.

所以我去了趟图书馆，查阅了,第六版的《高级熔融态盐化学》,因为那里面有一篇关于生产镁的,化学和电化学的文章。

麻省理工公开课 - 固态化学导论课程节选