Đáp án:
Giải thích các bước giải:
NaOH: 23+16+1=40
K3PO4: 39.3+31+16.4=212
Al2O3: 27.2+16.3=102
NaHCO3: 23+1+12+16.3=84
Al(OH)3: 27+(16+1).3=78
Cu(OH)2: 64+(16+1).2=98
Al2(SO4)3= 27.2+(32+16.4).3=342
Mg(NO3)2= 24+(14+16.3).2=148
Al(NO3)3= 27+(14+16.3).3=213
Fe2(SO4)3= 56.2+(32+16.4).3=400
Na2SO4= 23.2+32+16.4=142
P2O5 = 31.2+16.5=142
NaHSO4= 23+1+32+16.4=120
NH4NO3= 14+1.4+14+16.3=80
H2SO4= 1.2+32+16.4=98
