Question

Find the value of y.

$3Fe+y{H}_{2}O\to F{e}_3{O}_4+4H_2$

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is D

4

Keeping in mind that a balanced chemical equation has equal number of atoms of each element equal on both sides, let us balance the equation given.

Since there are 8 atoms of hydrogen on the products side, filling a 4 in place of y balances the given equation because it also balances the number of atoms of iron and oxygen atoms on both sides.

i.e., $3Fe+4H_{2}O\to F{e}_3{O}_4+4H_2$

y = 4.