Question

masa de aluminiu care cedeaza 36,138×10 la puterea 23 electroni

Answer 1

Al are Z = 13

1s2 2s2 2p6 3s2 3p1 => 1 mol (27 g) cedeaza 3e- trecand in Al3+

=>

27 g Al (1 mol)...................... 3x6,022x10la23 e-

a g Al .......................................36,138x10la23 e-

=> a = 36,138x10la2x27/3x6,022x10la23 = 54 g Al