1 of 41 of 4 Items
Question
Which substance combines with iron in the presence of water to form rust?
Responses
oxygen
oxygen - no response given
nitrogen
nitrogen - no response given
acid
acid - no response given
carbon dioxide
carbon dioxide - no response given
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The correct answer is oxygen.
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The substance that combines with iron in the presence of water to form rust is oxygen.
To find the answer to this question, we need to understand the process of rust formation. Rust is the red or orange coating that forms on the surface of iron when it combines with oxygen in the presence of water.
So, the substance that combines with iron in the presence of water to form rust is oxygen.
To determine the correct answer, we can eliminate the other options. Nitrogen and carbon dioxide do not react with iron in the presence of water to form rust. Acid can accelerate the rusting process, but it is not the primary substance that combines with iron to form rust. Oxygen is the main substance involved in the oxidation of iron, leading to the formation of rust.
Therefore, the correct answer is oxygen.