trebuie sa stii/
1mol molecule...are masa molara M,g.........are nr.molec= N,A=6,023X10²³molecule (numarul lui Avogadro) !!!!!!!!!
..3mol Cl2...................3x71g M,Cl2= 71g/mol
..0,5molAl(OH)3.........0,5x78g M,Al(OH)3=78g/mol
..4molHNO3................4x.63g M,HNO3=63g/mol
7,1/71=0,1molCl2...........0,1xN,A molecule
