Question

Cate molecule de argon se gasesc in 20 g de argon?

Answer 1

Stim masa de argon deci vom folosi formula nr de moli pt a afla:n=m/M=>n=20/39=0,5 moli Ar

Calculăm nr molecule cu :n=N/NA

N=n*NA

N=0,5*6,023*10^23

N=3,01*10^23 molecule Ar

Succes!