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四氧化三铁与三氧化二铁的质量比
四氧化三铁与三氧化二铁的质量比
2025-03-29 04:49:49
推荐回答（1个）
回答1：
三氧化二铁
中铁的质量占7/10
四氧化三铁
中铁的质量占21/29
要使三氧化二铁和四氧化三铁含有相同质量的铁元素，则三氧化二铁和四氧化三铁的质量比应为：
21/29：7/10=30：29
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