\(n_S=\dfrac{1,6}{32}=0,05\left(mol\right)\)
\(n_{O_2}=\dfrac{3,2}{32}=0,1\left(mol\right)\)
PT: \(S+O_2\underrightarrow{t^o}SO_2\)
Xét tỉ lệ: \(\dfrac{0,05}{1}< \dfrac{0,1}{1}\), ta được O2 dư.
Theo PT: \(n_{O_2\left(pư\right)}=n_S=0,05\left(mol\right)\Rightarrow n_{O_2\left(dư\right)}=0,1-0,05=0,05\left(mol\right)\)
\(\Rightarrow m_{O_2\left(dư\right)}=0,05.32=1,6\left(g\right)\)