# Chemistry

Iron combines with oxygen and water from the air to form rust. If an iron nail were allowed to rust completely, one should find that the rust weighs:

I know the answer is the rust should way more than the nail it came from but can someone explain why please!

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1. Rust is Fe2O3.xH2O
So rust is the combined weight of the iron nail you started with PLUS the weight of the oxygen added PLUS the weight of the water added.

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2. the iron combines with oxygen and water from the air to form rust. if an iron nail were allowed to rust completely one would find that the rust weighs

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3. Ty I got a 100 :)

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