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82问答网 > 要燃烧多少克磷才能得到14.2g的五氧化二磷？消耗标准状况下的空气多少升？

要燃烧多少克磷才能得到14.2g的五氧化二磷？消耗标准状况下的空气多少升？

2025-03-15 09:47:37

推荐回答（2个）

回答1：

4P + 5O2 = 2P2O5
4*31 5*22.4 2*142
X y 14.2
X=6.2克，Y =5.6升。5.6÷21%=26.7升。
要燃烧6.2克磷才能得到14.2g的五氧化二磷？消耗标准状况下的空气26.7升。

回答2：

4P + 5O2 == 2P2O5
4*31 160 284
x y 14.2g
所以 x=6.2g y=8g
n=v/vm 所以体积为
8/32*22.4=0.01L

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