Which substance combines with iron in the presence of water to form rust?(1 point)

Ah, rust, the bane of iron's existence! In the presence of water, iron likes to cozy up with a mischievous little substance called oxygen. They team up to create iron oxide, or as we all know it, rust! It's like the ultimate bad blind date for iron, really.

The substance that combines with iron in the presence of water to form rust is oxygen. When iron comes into contact with water and oxygen, a chemical reaction occurs where the iron oxidizes, creating iron oxide or rust.

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The substance that combines with iron in the presence of water to form rust is oxygen.