a) \(n_{Fe_3O_4}=\dfrac{23,2}{232}=0,1\left(mol\right)\)
PTHH: \(Fe_3O_4+4CO-t^o>3Fe+4CO_2\)
________a----->4a------------>3a______________(mol)
=> 232(0,1-a) + 56.3a = 19,36
=> a = 0,06 (mol)
=> \(n_{CO}=4a=0,24\left(mol\right)\) => VCO = 0,24.22,4 = 5,376 (l)
b) \(\left\{{}\begin{matrix}n_{Fe}=3a=0,18\left(mol\right)\\n_{Fe_3O_4}=0,1-0,06=0,04\left(mol\right)\end{matrix}\right.\)
PTHH: \(Fe+6HNO_3->Fe\left(NO_3\right)_3+3NO_2+3H_2O\)
____0,18------------------------------------>0,54_______________(mol)
\(Fe_3O_4+10HNO_3->3Fe\left(NO_3\right)_3+NO_2+5H_2O\)
0,04----------------------------------------->0,04________________(mol)
=> nNO2 = 0,54 + 0,04 = 0,58 (mol)
=> VNO2 = 0,58.22,4 = 12,992 (l)