1)Gọi x;y là số mol SO2;O2
Theo gt:MX=25,7.\(M_{H_2}\)=25,7.2=51,4(g)
=>\(\dfrac{64x+32y}{x+y}\)=51,4
=>64x+32y=51,4x+51,4y=>x=1,54y
*Vì %V=%n nên:
\(\%V_{O_2}\)=%\(n_{O_2}\)=\(\dfrac{x}{x+y}\).100%=\(\dfrac{x}{1,54x+x}\).100%=39,37%
\(\%V_{SO_2}\)=60,63%
2)nX=2,24:22,4=0,1(mol)
=>\(n_{SO_2}\)=60,63%.0,1=0,06(mol)
=>\(n_{O_2}\)=0,1-0,06063=0,04(mol)
Ta có PTHH:
2SO2+O2\(\xrightarrow[V_2O_5]{to}\)2SO3
0.06....................0.06..........(mol)
Ta có:\(\dfrac{n_{SO_2}}{2}< \dfrac{n_{O_2}}{1}\)(0,03<0,04)=>SO2 hết;O2 dư.Tính theo SO2
Theo PTHH:\(n_{SO_3\left(pt\right)}\)=0,06(mol)
mà H=80%=>\(n_{SO_3\left(tt\right)}\)=0,06.80%=0,048(mol)
=>\(m_{SO_3\left(tt\right)}\)=0,048.80=3,84(g)