Step-by-step explanation:
First part,
4 Fe + 3 O2 => 2 Fe2O3
The reaction above must have the same number of atoms on both sides.
On the left, 4 Fe and 6 O
On the right, 4 Fe and 6 O
Therefore, it is balanced correctly.
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Second part,
Type of reaction:
This reaction is known to be a synthesis reaction o a combination reaction.
The reaction has the form: A + B => AB
Answer:
It is balanced correctly.
A synthesis or combination reaction.