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82问答网 > 硝酸铵（NH4NO3）是一种常见的氮肥．（1）硝酸铵中氮元素的质量分数为______．（2）某花卉基地需要配制10

硝酸铵（NH4NO3）是一种常见的氮肥．（1）硝酸铵中氮元素的质量分数为______．（2）某花卉基地需要配制10

2025-04-07 05:54:31

推荐回答（2个）

回答1：

（1）根据硝酸铵的化学式可知，氮元素的质量分数为：

14×2

14+4+14+16×3

×100%＝35%；
（2）设需要20%的硝酸铵溶液的质量为x，则
100kg×10%=x×20%
x=50kg．
故答案为：（1）35%；（2）50．

回答2：

设5%的硝酸铵溶液的质量为a，则30%的硝酸铵的质量为50-a。
ax5%+(50-a)x30%=100x10%
x=80
配制：分别称取10%的硝酸铵溶液80kg和30%的硝酸铵溶液20kg，在烧杯中将二者混合均匀即可。

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