Fe + 2HCl......FeCl2+ H2
56 kg Fe................2Kg H2..........................2.36,5 Kg HCl
xKg........................10 Kg ..............................z
a) x= 10.56/2=280 kgFe pur
300Kg Fe impur................280Kg pur
100 ...................................Y
Y=280.100/300=93,33%
b)z=10.2.36,5/2=365 Kg HCl
1 kmol HCl.........2 kgHCl...............6,023.10^{23 molecule
365 kg....................t
t=365.6,023.10^{23/2 molecule HCl