Question

In the balanced equation:
${\mathrm{aFe}}_2{O}_3+{\mathrm{bH}}_2\to \mathrm{cFe}+{\mathrm{dH}}_{2}O$
The value of a, b, c, d are respectively ________

• A. 1, 3, 2, 3
• B. 1, 1, 1, 1
• C. 1, 1, 2, 3
• D. 1, 2, 2, 3

Answer 1

The correct option is A 1, 3, 2, 3

The balanced reaction can be written as follow:
${\mathrm{Fe}}_2{O}_3+3H_2\to 2\mathrm{Fe}+3H_{2}O$
Thus, a → 1, b → 3, c → 2, d → 3