What type of reaction is: 4 Fe + 3 O2 → 2 Fe2O3 A. synthesis
B. double replacement
C. decomposition
D. single replacement

A. synthesis

Explanation:

The reaction given is a synthesis reaction in which two substances combines to give a product.

In this reaction:

      4Fe + 3O₂ →  2Fe₂O₃

The reaction involves the formation of a single product from two or more reactants.

The formation of a compound from union of the constituent elements also falls into this category of reaction.

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