Al2O3
nAl:nO= 2:3
mAl:mO=2x27:3x16= 54:48=27:24=9:8
M,Al2O3= (2x27gAl+3x16gO)/mol= 102g/mol
1mol.......102g
x..............306g.......................calculeaza !!!
102goxid.......54gAl........48go
100g................x...............y.........................calculeaza !!!
102g oxid............54gAl
500g........................x.............................calculeaza !!!
1molAl............N,A=6,023X10²³ atomi
x...................................24,088x10²³ at
x=4molAl
1mol oxid.........................2molAl
x........................................4mol.............................calculeaza !!!!
