96g O=?moli
3 moli Fe=? g
2 moli Mg=?atomi
120g C=? atomi
va rog repedee​

Răspuns:

Explicație:

96 g O

n= m : M

n= 96g : 32g/moli= 3moli O2

3moli Fe

m= n .M

m= 3moli .56g/moli= 168g Fe

2moli Mg

1mol Mg ---------6,022.10²³atomi Mg

2moli Mg------------------x

x= 2. 6,022.10²³atomi Mg= 12,044.10²³atomi Mg

120g C

n= 120g : 12g/moli=10moli C

1mol C-------------6,022.10²³atomi C

10moli C-----------------x

x= 10 . 6,022.10²³atomi C= 60,22.10²³atomi C