Răspuns:
Explicație:
MFe2O3=2.56 + 3.16=160------>160g/moli
MCu(NO3)2=64 + 2.14 +6.16=188------>188g/moli
MHNO3=1+14 +3.16=63------->63g/moli
MNa2CO3=2.23 + 12 +3.16=106------>106g/moli
MMg(OH)2=24 + 2.16 +2=58------>58g/moli