Mr:
a) (CO²)=12+16•2=44
(SO³)=32+16•3=74
(KCl)=39+35.5=74.5
(Fe²O³)=56•2+16•3=160
b) (NaOH)=23+16+1=40
(H²CO³)=1•2+12+16•3=62
(Ba(OH)²)=137+1•2+16•2=171
(Al(OH)³)=27+16•3+1•3=78
в) (Li³PO⁴)=7•3+31+16•4=100
(Fe²SO⁴)=56•2+32+16•4=192
(C¹²H²²O¹¹)=12•12+1•22+16•11=342