1.
V=22.4*n=22.4*(m/M)=22.4*(2.2/44)=1.12L
2.
M=m/n=m/(V/22.4)=1.92/(672/1000*22.4)=64
3.
Zn + 2HCl = ZnCl + H2
1 x=1
V=22.4*nH2=22.4*nZn=22.4*m/M=22.4*26/65=8.96L
4.
nKCl:nNaCl=nK:nNa=3:1
mKCl:nNaCl=MKCl*nKCl:MNaCl*nNaCl=74.5*3:58.5=223.5:58.5
wKCl=mKCl/m总=223.5/(223.5+58.5)=79.25%
m=0.75*MKCl+0.25*MNaCl=0.75*74.5+0.25*58.5=70.5g饿。。麻烦把2和3分个步骤。。谢了、、2.n=V/22.4=(672/1000)/22.4=0.03molM=m/n=1.92/0.03=643.Zn + 2HCl = ZnCl + H21126/65=0.4mol x=0.4molV=22.4*nH2=22.4*0.4=8.96L这样可以了么？