a)\(3Fe+2O2-->Fe3O4\)
\(n_{Fe3O4}=\frac{116}{232}=0,5\left(mol\right)\)
\(n_{Fe}=3n_{Fe3O4}=1,5\left(mol\right)\)
\(m_{Fe}=1,5.56=84\left(g\right)\)
b)\(n_{O2}=2n_{Fe3O4}=1\left(mol\right)\)
\(m_{O2}=1.32=32\left(g\right)\)
c)\(V_{O2}=1.22,4=22,4\left(l\right)\)
\(V_{kk}=5V_{O2}=22,4.5=112\left(l\right)\)
a)3Fe+2O2−−>Fe3O4
1,5----1--------------0,5 mol
nFe3O4=116\232=0,5(mol)
==>mFe=1,5.56=84(g)
b)==>mO2=1.32=32(g)
c)VO2=1.22,4=22,4(l)
Vkk=5.VO2=22,4.5=112(l)