Question

use the drop - down menus below to complete the statement about the burning steel wool investigation.
in the procedure, one of the reactants needed to form iron oxide is introduced in choose... in the form of a gas. if a student wanted to increase the amount of iron oxide formed, the student could repeat this step over time and add more choose... to the reaction.

Explanation:

When steel wool burns, it reacts with oxygen (\(O_2\)) gas. The chemical reaction for the formation of iron oxide (\(Fe_2O_3\)) from iron (\(Fe\)) and oxygen is \(4Fe + 3O_2
ightarrow2Fe_2O_3\). To increase the amount of iron oxide formed, more of the limiting reactant (assuming iron is in excess, which is often the case in such set - ups as steel wool is usually in large enough quantity initially) can be added. Since oxygen is a gas reactant in this reaction, adding more oxygen (by, for example, exposing the steel wool to more air over time) will drive the reaction forward to produce more iron oxide.

Answer:

First blank: oxygen; Second blank: oxygen