You Do Need power plug adapter while traveling from Mozambique to Belgium.

Here is Why You Need An Adapter

The outlet and plug type used in Belgium are C and E and in Mozambique are C, F and M. This is how they look like.

Mozambique

In Mozambique, outlets of type C, F and M are in use.

Type C

Type F

Type M

Belgium

In Belgium, outlets of type C and E are in use.

Type C

Type E