elemntul are structura K2 L8 M6---> Z= 16----> S
compusul este FeS
1molFe..se gaseste in 1 mol FeS pur
20mol..............................x=20molFeS pur
m= nxM= 20(56+32)g=1760g FeS pur
p= m,px100/m,i---> m,i= 1760x100/80=.....................calculeaza !!!!
1mol......2mol
FeS+ 2HCl----> FeCl2 +H2S
20mol....x= 40molHCl
m= nxM= 40X36,5 g=1460gHCl--> este mdizolvat
c=mdx100/ms---> ms=1460x100/10=.................calculeaza!!!!
1atFe : 1at S