Răspuns:
1) Calculam cantitatea de Sulf
niu(S) = m/M = 2/32 = 0.0625 mol
2) Calculam numarul de atomi de sulf
niu(S) = nr de particule / nr lui Avogadro =>
Nr de particule = 0.0625 mol / 6.022*10^23 particule = 0.01*10^23 atomi
3) Calculam numarul de protoni
Nr protoni = nr de atomi * nr de ordine = 0.01*10^23 atomi * 16 = 0.16*10^23
