m,=2000kg FeS2 IMPURA
masa de pirita pura se calculeaza din puritate
p=m,px100/m,i---> 75/100=m,p/2000-------> m,p= 1500kg
M,FeS2= 120g/mol=120kg/kmol
120kg.........1kmol
1500kg..........x...........................calculeaza.; daca vrei sa transformi in moli, inmultesti rezultatul cu 1ooo
