Răspuns:
Explicație:
1.
nr.moli ----> n= 12,046.10²³ : 6,023.10²³ = 2moli Mg
m= n .M
m= 2moli . 24g/moli = 48g Mg
2.
5moli Ag
nr.moli =?
nr. atomi Ag =?
n= m . M
n= 5moli .108g/moli = 540 g Ag
1mol de atomi Ag------------------6,022.10²³ atomi Ag
5moli Ag-----------------------------------x
x= 5 . 6,022.10²³ = 30,11 .10²³ atomi Ag