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氧气一般开多少个压
更新时间: 2020-10-22 00:00:00  

氧气表一般调到2-3个刻度压。氧气,氧元素形成的一种单质。氧气(oxygen),无色无味气体,氧元素最常见的单质形态。熔点-218.4℃,沸点-183℃。

氧气不易溶于水,1L水中溶解约30mL氧气。在空气中氧气约占21%。液氧为天蓝色。固氧为蓝色晶体。常温下不是很活泼,与许多物质都不易作用。但在高温下则很活泼,能与多种元素直接化合,这与氧原子的电负性仅次于氟有关。

关键词: 氧气 一般 多少

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