Х г. 2г
2mg + O2=2MgO
48г. 80г
Х: 48 = 2×80
Х=1,2г
Mg+2hCl=MgCl2+H2
Zn+2AgNO3=Zn(NO3)2+2Ag
Hg+FeCL=HGCl+Fe
3Mg+2AlCl3=3MgCL2+2Al
CH3-COH+2Cu(OH)2=CH3COOH+Cu2O+H2O
n(CH3COH)=22/44=0,5 моль
n(CH3COOH)=n(CH3COH)=0,5 моль
m(CH3COOH)=0,5*60=30 г
Ca+2 Cl-; N0; P+5 O-2; Na+ P+5 O-2; Cu+2 NO3-