👤

va roggggggggggggggggggggggggggggggg

Va Roggggggggggggggggggggggggggggggg class=

Răspuns :

CACO3 = CAO + CO2(prima e bine  scrisa)

Fe + 2 HCl = FeCl2 + H2
2 H2 + O2 = 2 H2O