Al2(CO3)3
Se calculeaza masa moleculara M
M=2.27+3.12+9.16=54+36+144=234
234 g Al2(CO3)3------54g Al ---------36 g C-----------144 g O
100 g-------------------------x----------------y-----------------------z
x=100.54:234=23,07 la suta Al
y=100.36:234=15,38 la suta C
Z=100.144:234=61,53 la suta O
