Răspuns:
Explicație:
MHCl= 1+35,5=36,5-------->36,5g/moli
n=7,3g : 36,5g/moli=0,2moli HCl
1mol HCl------------6,023.10²³molecule HCl
0,2 moli HCl--------------x
x=0,2 . 6,023.10²³ = 1,2046 .10²³ molecule HCl
