Răspuns:
a)1 mol Mg ..... 6.023 atomi
2 moli Mg ..... x
x=2*6.023=12.046 atomi Mg
b)1 mol Ag ....... 6.023 atomi
0.5 moli Ag ....... y
y=6.023*0.5=3.0125 atomi Ag
c)0.5kmoli = 500 moli
1 mol Ag......6.023 atomi
500 moli Ag ....... z
z=500*6.023=3011.5 atomi Ag