\(3,36dm^3=3,36l\\ n_{Fe}=0,225\left(mol\right);n_{O_2}=0,15\left(mol\right)\\ PTHH:3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\\ TL:\frac{0,225}{3}=\frac{0,15}{2}\rightarrow2.chat.het\\ m_{Fe_3O_4}=0,075.232=17,4\left(g\right)\)
\(3,36dm^3=3,36l\\ n_{Fe}=0,225\left(mol\right);n_{O_2}=0,15\left(mol\right)\\ PTHH:3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\\ TL:\frac{0,225}{3}=\frac{0,15}{2}\rightarrow2.chat.het\\ m_{Fe_3O_4}=0,075.232=17,4\left(g\right)\)
3Fe + 2O2 ----> \(Fe_3O_4\)
\(n_{Fe}\) = \(\frac{12,6}{56}\) = 0,225 mol
n\(O_2\) = \(\frac{3,36}{22,4}\) = 0,15 mol
Lập tỉ lệ: \(\frac{0,225}{3}=\frac{0,15}{2}\)
=> 2 chất đều hết
n\(Fe_3O_4\) = \(\frac{1}{2}.0,15\) = 0,075 mol
m\(Fe_3O_4\) = 0,075.232 = 17,4 g