Zn + 2HCl -> ZnCl₂ + H₂
3H₂ + N₂ -> 3NH₃
a)65g Zn.......2x36.5g HCl
130g Zn........xg HCl
=>x=130x2x36.5/65=146g HCl (md)
c=100md/ms => ms=100md/c => ms=100x146/20=730 g solutie HCl de c=20%
b)65g Zn......22.4 L H₂
130g Zn......y L H₂
=>y=130x22.4/65=44.8 L H₂
c)3x22.4 L H₂.....2moli NH₃
44.8 L H₂.........z moli NH₃
=>z=44.8x2/(3x22.4)=1.33 moli NH₃