Which one of the following equations is the balanced chemical equation for the given reaction?<br>Fe + H_{2}O \rightarrow Fe_{3}O_{4} + H_{2}

  1. A. Fe + 4H_{2}O \rightarrow Fe_{3}O_{4} + H_{2}
  2. B. 3Fe + H_{2}O \rightarrow Fe_{3}O_{4} + 2H_{2}
  3. C. 3Fe + 4H_{2}O \rightarrow Fe_{3}O_{4} + 4H_{2} ✓
  4. D. 3Fe + 4H_{2}O \rightarrow Fe_{3}O_{4} + H_{2}

Correct Answer: C. 3Fe + 4H_{2}O \rightarrow Fe_{3}O_{4} + 4H_{2}

Explanation

To satisfy the Law of Conservation of Mass, there must be 3 Fe and 8 H on both sides. Thus, 3Fe + 4H_{2}O \rightarrow Fe_{3}O_{4} + 4H_{2} is the balanced equation.

Related questions on Chemistry

Practice more CDS General Knowledge questions