nZnS=19,4/97=0,2mol
nO2=8,96/32=0,23mol
PTHH: 2ZnS + 3O2\(\dfrac{t^o}{ }>\) 2ZnO+2SO2
TheoPt: 2mol 3mol 2mol
Theo bài: 0,2mol 0,23mol
PỨ 0,153mol 0,23mol 0,153mol
Còn 0,047mol 0 0,153mol
Tỉ lệ\(\dfrac{0,2}{2}>\dfrac{0,23}{3}\)->Vậy O2 hết, ZnS dư, tính theoO2
VSO2=0,153.64=9,792l
PTHH: \(2ZnS+3O_2\underrightarrow{t^0}2ZnO+2SO_2\uparrow\)
\(nZnS=\dfrac{19,4}{97}=0,2\left(mol\right)\)
\(nO_2=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)
Ta có tỉ lệ: \(\dfrac{n_{ZnS}}{2}:\dfrac{n_{O_2}}{3}=\dfrac{0,2}{2}< \dfrac{0,4}{3}\Rightarrow ZnSpư\left(hết\right)\)
Theo PThh có: nSO2 = nZnS = 0,2 mol ⇒ mSO2 = 0,2.64 = 12,8(lít)
\(PTHH:2ZnS+3O_2\underrightarrow{t^o}2ZnO+2SO_2\uparrow\)
\(n_{ZnS}=\dfrac{19,4}{97}=0,2\left(mol\right)\)
\(n_{O_2}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)
Ta có tỉ lệ:\(\dfrac{n_{ZnS}}{2}:\dfrac{n_{O_2}}{3}=\dfrac{0,2}{2}< \dfrac{0,4}{3}\Rightarrow\)ZnS pư hết.
Theo PTHH ta có:\(n_{SO_2}=n_{ZnS}=0,2\left(mol\right)\Rightarrow m_{SO_2}=0,2.64=12,8\left(l\right)\)
PTHH:2ZnS+3O2to→2ZnO+2SO2↑
nZnS=19,497=0,2(mol)nZnS=19,497=0,2(mol)
nO2=8,9622,4=0,4(mol)nO2=8,9622,4=0,4(mol)
Ta có tỉ lệ:nZnS2:nO23=0,22<0,43⇒nZnS2:nO23=0,22<0,43⇒ZnS pư hết.
Theo PTHH ta có:nSO2=nZnS=0,2(mol)⇒mSO2=0,2.64=12,8(l)