Stabileste coeficientii urmatoarelor ecuatii chimice:
1.Mg+O2-->MgO
2.H2+I2-->HI
3.NaOH+AlCl3-->Al(OH)3 o sageata in jos+NaCl
4.NaHCO3-->pe sageata scrie "t Grade" Na2CO3 o sageata in sus+H2O
5.Fe+HCl-->FeCl2+H2 o sageata in sus
6.KOH+H3PO4-->K3PO4+H2O
7.CaO+H2O-->Ca(OH)2

Va rog ajutati-ma ca nu stiu. :o3