Oxygen Gas
The gas that makes a wet iron nail rust is oxygen. When iron comes into contact with oxygen in the presence of water, it undergoes a chemical reaction called oxidation, forming iron oxide, which is the rust that we see.
Oxygen is the only gas which rust the metals.
Oxygen gas is needed for iron to rust. When iron is exposed to oxygen and moisture in the air, a chemical reaction occurs that forms iron oxide, which is known as rust.
air
The gas that forms rust with water and iron is oxygen. Rust is formed when iron reacts with oxygen and water in a process called oxidation.
The oxygen gas in rust comes from the oxidation of iron when it reacts with oxygen in the air or water. This reaction forms iron oxide, commonly known as rust, and releases oxygen gas as a byproduct.
Iron nails are a solid
iron oxide(rust) - Fe2O3
I had to do this in an experiment this year. I put a galvanized zinc nail in vinegar for two hours. When I came back, I did not notice any change in the zinc nail. After researching online, I discovered that nails are galvanized to prevent corrosion. That is why the vinegar did not cause the nail to rust.
You are correct.
A gas can be a reactant in a chemical reaction. For example, iron and the gas oxygen react to form rust, which is iron oxide.
Oxygen (O2) is the gas.