Mass of Fe₂O₃ : 74.26 g
Volume of O₂ at STP = 15.624 L
Further explanation
Reaction
4Fe (s) + 3O₂ (g) ==> 2Fe₂O₃ (s)
mol Fe :
Ar Fe = 56 g/mol
[tex]\tt \dfrac{52}{56}=0.93[/tex]
mol Fe₂O₃ :
[tex]\tt \dfrac{2}{4}\times 0.93=0.465[/tex]
mass Fe₂O₃ :
MW Fe₂O₃ : 159,69 g/mol
[tex]\tt 0.465\times 159,69=74.26~g[/tex]
mol O₂ :
[tex]\tt \dfrac{3}{4}\times 0.93=0.6975[/tex]
volume O₂ at STP(1 mol=22.4 L)
[tex]\tt 0.6975\times 22.4=15.624~L[/tex]
