PT: \(4Fe\left(NO_3\right)_3\underrightarrow{t^o}2Fe_2O_3+12NO_2+3O_2\)
a, \(n_{Fe\left(NO_3\right)_3}=\dfrac{121}{242}=0,5\left(mol\right)\)
Theo PT: \(n_{NO_2\left(LT\right)}=3n_{Fe\left(NO_3\right)_3}=1,5\left(mol\right)\)
\(\Rightarrow V_{O_2\left(LT\right)}=1,5.24,79=37,185\left(l\right)\)
\(\Rightarrow H\%=\dfrac{24,79}{37,185}.100\%\approx66,67\%\)
b, \(n_{NO_2}=\dfrac{24,79}{24,79}=1\left(mol\right)\)
Theo PT: \(n_{O_2}=\dfrac{1}{4}n_{NO_2}=0,25\left(mol\right)\)
\(\Rightarrow V_{O_2}=0,25.24,79=6,1975\left(l\right)\)
c, \(n_{Fe_2O_3}=\dfrac{1}{6}n_{NO_2}=\dfrac{1}{6}\left(mol\right)\)
\(\Rightarrow m_{Fe_2O_3}=\dfrac{1}{6}.160=\dfrac{80}{3}\left(g\right)\)