Question

iron (fe) reacts with oxygen (o₂) in the air to form rust, fe(s) + o₂(g) → fe₂o₃(s). iron and oxygen are the
catalyst
reactants
products

Explanation:

In a chemical reaction, substances that undergo change are reactants. Here, iron and oxygen combine to form rust (iron - oxide), so they are reactants. A catalyst speeds up a reaction without being consumed, and products are the substances formed in the reaction.

Answer:

B. reactants