下列物质个50g求所含氮元素①NH3②NH4NO3③co（NH2）2；二多少克下列物质中有5g氧元素①H2O②H2So4.

分类: 作业答案 • 2021-11-30 10:11:23

问题描述：

答

1 ①50g÷17g/mol×14g/mol=41.2g
②50g÷80g/mol×28g/mol=17.5g
③50g÷60g/mol×28g/mol=23.3g
2①x÷18g/mol×16g/mol=5g,解得x=5.625g
y÷98g/mol×64g/mol=5g,解得y=7.66g