Răspuns:
ZnO + 2 HCl → ZnCl2 + H2O
CaCl2 + H2O2 → CaO2 + 2HCl
AlCl3 + 3 NaOH → 3 NaCl + Al(OH)3
ZnCl2 + 2 AgNO3 → Zn(NO3)2 + 2 AgCl
Na2SO4 + BaCl2 → 2 NaCl + BaSO4
m=Fe2O3=320g
mFe=?
MFe2O3=2x56+3x16=160g/mol
MFe=56g
160g....................2x56g
Fe2O3 + 3H2 → 2Fe + 3H2O
320g.....................xg
x=320x2x56/160= calculeaxa
Explicație:
