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元素质量比的计算

> 只有合理使用物质，才能使物质造福人类。三聚氰胺（C 3N 6H 6）有很多用途：制作环保阻燃剂、化肥等。（1）1个C 3N 6H 6分子中共有个原子。（2）C 3N 6H 6中碳元素与氮元素的质量比为。（3）C 3N 6H 6中氮元素的质量分数为。（保留一位小数）

问题：

发布时间：2024-09-13

只有合理使用物质，才能使物质造福人类。三聚氰胺（C ₃N ₆H ₆）有很多用途：制作环保阻燃剂、化肥等。
（1）1个C ₃N ₆H ₆分子中共有    个原子。
（2）C ₃N ₆H ₆中碳元素与氮元素的质量比为       。
（3）C ₃N ₆H ₆中氮元素的质量分数为      。（保留一位小数）

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