Steel wool is fine ribbons of steel, and steel doesn't have a fixed chemical formula. We know that steel is mostly iron (Fe) with a percent or so of carbon. We also know that different trace metals appear in it as well. We thus know that steel wool doesn't have a specific chemical formula as it is a metal alloy, which is actually a mixture, and not what we generally think of as a chemical compound.
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The chemical formula of steel wool is Fe, which represents the element iron. Steel wool is composed mainly of iron, with small amounts of other elements depending on the specific type or grade of steel.
4 Fe + 2 O2 ---->>>> 2 Fe2O3 is not correct. It should read 4 Fe + 3 O2 --> 2Fe2O3, I assume you are using Iron(III) in the reaction.
If you put steel wool in a jar and add an oxidizing agent, such as oxygen or hydrogen peroxide, a chemical reaction will occur, causing the steel wool to rust or oxidize. This reaction generates heat and can produce sparks, so it's important to handle it carefully and ensure proper ventilation.
Both steel wool and rocks undergo physical and chemical weathering processes when exposed to the elements. Steel wool can rust when exposed to moisture, similar to how rocks can break down due to freezing and thawing cycles or chemical reactions with water. Both processes result in the breakdown of the material over time.
Steel wool is a Mixture-Mechanical
Copper is deposed on the steel wool.
Thick steel wool will conduct electricity better than thin steel wool because it has more surface area for the current to flow through. The thicker material allows for more pathways for the electricity to travel, resulting in lower resistance and better conductivity.