Rust is a compound with the formula Fe_{2}O_{3}. Which elements combine to form rust?
A B C D
iron and water iron and oxygen iron and air iron and acid
Question: Rust is a compound with the formula Fe_{2}O_{3}. Which elements combine to form rust?
(A) iron and water
(B) iron and oxygen
(C) iron and air
(D) iron and acid

Answer: (B) iron and oxygen
Answer: (D) iron and acid
Question: Rust is a compound with the formula Fe_{2}O_{3}. Which elements combine to form rust?
(A) iron and water
(B) iron and oxygen
(C) iron and air
(D) iron and acid
Answer: (B) iron and oxygen