which substance is used to remove rust from metal?\nlye (naoh)\nhydrochloric acid (hcl)\nammonia…

Brief Explanations:

Rust is iron - oxide. Acids react with metal oxides to form salts and water. Hydrochloric acid is commonly used for rust removal as it can effectively react with iron - oxide. Lye is a base and won't react with rust in a way to remove it. Ammonia is a weak base and not effective for rust removal. Sulfuric acid can also react with rust but is more dangerous and less commonly used for simple rust - removal tasks compared to hydrochloric acid.

Answer:

B. hydrochloric acid (HCl)