a. PTHH: \(2Al+3O_2\rightarrow2Al_2O_3\\ 0,2mol:0,3mol\rightarrow0,2mol\)
b. \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)
\(V_{O_2}=0,3.22,4=6,72\left(l\right)\)
a) 4Al + 3O2 \(\underrightarrow{to}\) 2Al2O3
\(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)
b) Theo PT: \(n_{O_2}pư=\dfrac{3}{4}n_{Al}=\dfrac{3}{4}\times0,2=0,15\left(mol\right)\)
\(\Rightarrow V_{O_2}dư=0,15\times22,4=3,36\left(l\right)\)