\(a) n_{Al} = \dfrac{5,4}{27} = 0,2(mol)\\ 4Al + 3O_2 \xrightarrow{t^o} 2Al_2O_3\\ n_{O_2} = \dfrac{3}{4}n_{Al} = 0,15(mol)\\ \Rightarrow V_{O_2} = 0,15.22,4 = 3,36(lít)\\ b)C_3H_4 + 4O_2 \xrightarrow{t^o} 3CO_2 + 2H_2O\\ V_{O_2} = 4V_{C_3H_4} = 11,2.4 = 44,8(lít)\)
a, \(n_{Al}=\dfrac{m}{M}=0,2\left(mol\right)\)
\(4Al+3O_2\rightarrow2Al_2O_3\)
..0,2..0,15........
\(\Rightarrow V_{O_2}=n.22,4=3,36\left(l\right)\)
b, ( mk nghĩ đề là CH4 :VVV )
\(n_{CH_4}=\dfrac{V}{22,4}=0,5\left(mol\right)\)
\(CH_4+2O_2\rightarrow CO_2+2H_2O\)
.0,5......1...............
\(\Rightarrow V_{O_2}=n.22,4=22,4\left(l\right)\)
