选CO(NH2)2.
NH4Cl中N的质量分数=14/53.5*100%=26.17%
NH4NO3中N的质量分数=28/80*100%=35%
(NH4)2SO4中N的质量分数=28/132*100%=21.21%
NH4HCO3中N的质量分数=14/79*100%=17.72%
选CO(NH2)2.
NH4Cl中N的质量分数=14/53.5*100%=26.17%
NH4NO3中N的质量分数=28/80*100%=35%
(NH4)2SO4中N的质量分数=28/132*100%=21.21%
NH4HCO3中N的质量分数=14/79*100%=17.72%