Răspuns:
Explicație:
a.
70 g Cl-----> n= m : M
MCl2 = 2 . 35,5 = 71g/moli
n = 70g : 71g/moli = 0,98 moli Cl2
b.
1mol Cl2---------------6,022.10²³molecule Cl2
0,98 moli -------------------------x
x= 0,98 . 6,022.10²³ =5,93 molecule Cl2
c.
1mol Cl2---------2 . 6,022.10²³atomi Cl
0,98moli------------------y
y= 0,98 . 2 . 6,022.10²³ = 1`1,8 atomi Cl