\(V_{C_2H_5OH}=\dfrac{20.96}{100}=19,2\left(ml\right)\)
=> \(m_{C_2H_5OH}\) = 19,2.0,8 = 15,36 (g)
=> \(n_{C_2H_5OH}=\dfrac{15,36}{46}=\dfrac{192}{575}\left(mol\right)\)
PTHH: \(C_2H_5OH+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)
Theo PTHH: \(n_{O_2}=\dfrac{576}{575}\left(mol\right)\Rightarrow V_{O_2\left(đktc\right)}=\dfrac{576}{575}.22,4=\dfrac{12902,4}{575}\left(l\right)\)