3.01×1023 |
6.02×1023/mol |
13.6g |
34g/mol |
A.水的体积是0.112L,V(HCl)=0.5mol×22.4L/mol=11.2L、V(H2S)=0.4mol×22.4L/mol=8.96L、V(NH3)=0.2mol×22.4L/mol=4.48L,所以由小到大排列正确的是①④③②,故A错误;
B.水的密度是1g/mL,根据ρ=
M |
Vm |
C.水的质量是112g,m(HCl)=0.5mol×36.5g/mol=18.25g、m(H2S)=0.4mol×34g/mol=13.6g、m(NH3)=0.2mol×17g/mol=3.4g,所以质量从小到大顺序是④③②①,故C错误;
D.水中N(H)=
112g |
18g/mol |
故选D.