![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
某无公害蔬菜复合肥的成分是CO(NH2)2和K2SO4,已知固体混合物中氮元素的质量分数为14%,则固体混合物中硫酸钾的质量分数为()
A.31.4%
B.38.4%
C.30%
D.70%
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
D、70%
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.31.4%
B.38.4%
C.30%
D.70%
D、70%
A.KMnO4—NaNO2—CO(NH2)2
B.CO(NH2)2—NaNO2—KMnO4
C.NaNO2—KMnO4—CO(NH2)2
D.KMnO4—CO(NH2)2—NaNO2
A.硝酸铵NH4N03
B.碳酸氢钾KHC03
C.尿素CO(NH2)2
D.磷酸二氢铵NH4H2P04
已知下列数据(298.15K):
求298.15K下,CO(NH2)2(s)的标准摩尔生成吉布斯函数,以及下列反应的Kθ.