Question

Ile moli tlenu O2 potrzeba do utlenienia 2gFe do:

a. FeO

b.Fe2O3

c.Fe3O4

Answer 1

mFe=56u

 

a)

2Fe+O₂-->2FeO

 

2*56g Fe ---------- 1mol O₂

2g Fe -------------- xmol O₂

 

x=2g*1mol/112g

x=0,018mol

 

 

b)

4Fe+3O₂-->2Fe₂O₃

 

4*56g Fe ---------- 3mol O₂

2g Fe -------------- x mol O₂

 

x=2g*3mol/224g

x=0,027mol

 

 

c)

3Fe+2O₂-->Fe₃O₄

 

3*56g Fe ----------- 2mol O₂

2g Fe --------------- xmol O₂

 

x=2g*2mol/168g

x=0,024mol