Question

Se pesan 8.15g de Na determinar:cuantas moles representa?cuantos atomos de Na contiene esta masa?

Answer 1

Na = 23g
23g --- 1 mol
8.15g ---- x
x = (8.15)(1)/23
x = 0.35 moles

1 mol ---- 6.023x10^23 átomos
0.35 moles --- x
x = (0.35)(6.023x10^23)/1
x = 2.134x10^23 átomos