rezultatul la impartire este gresit; da 52,5g Fe
m,Fe nereactionat= 60-52,5=7,5g.
p,Fe reactionat= 52,5x100/60=87,5%
m,FeS este; 30/32= m/88=---> m= 82,5g
m,amestec= 7,5+ 82,5= 90g
90gamestec.......82,5gFeS
100g.......................X.....................................calculeaza !!!!!