1mol...............................1mol
Fe +2HCl----> FeCl2 + H2
a mol.H2 rezulta din a,mol Fe
Fe +-S---->FeS
FeS +2HCl---> FeCl2 +H2S
b mol H2S rezulta din b molFe si b molS
suma maselor molilor ce intra in reactie, trebuie sa fie 50g
(56a+56b)gFe+32b,gS= 50
a/b= 3/1
REZOLVAND SISTEMUL DE ECUATII, --> a= 0,4356 b= 0,2906
m,Fe= 56(a+b)=40,67g
m,Fe= 32b= 9,30g
50g amestec.......40,67gFe.......9,30g S
100g.....................x...........................Y