Question

Se dau :
nr.atomi=5x6,023x10²³
se cere :
m Mg =?
n Mg =?
Stie cineva ?

Answer 1

1 mol.... 6,023×10 la puterea23 atomi. x moli...5×6,023×10 la puterea 23. Din ambele => x moli=5×6,023×10 la 23÷6,023÷10 la 23. => x moli=5 moli=> 5 moli Mg(n=5 moli). m magneziu=n×M. m magneziu=5×24=120 g=> m Mg=120g