1atomMg cedeaza 2 electroni
1molMg....................2mol e
1molMg.....................2xN,A=2X6,023X10²³ e
x..............................................24,088x10²³ e
x= 2mol Mg
1mol....1mol
Mg + Cl2-----> MgCl2
2mol......n=2mol
m= n x M
m= 2molx (2x35,5)g/mol= .......................gCl2.......calculeaza !!!!