-CALCULEZ MOLI Al, stiind M,Al= 27g/mol
niu=m/M= 108g/27g/mol= 4mol
-calculez moli AlCl3 din ecuatia chimica
2mol.....................2mol
2Al + 3Cl2---> 2AlCl3
4mol....................x=4mol AlCl3---->
m=niuxM=4molX(27gAl+3X35,5gCl)/mol=..........calculeaza !!!!