Question

Balance the following chemical equation:

2 NO₂(g) + _H₂O() + O₂(g) → ____ HNO₃(aq) + H₂O(B)

Which option balances the equation?

A) 4 H₂O()
B) 3 H₂O()
C) 2 H₂O()
D) 5 H₂O()

Answer 1

The correct option is 4 H₂O().

Step-by-step explanation:

The correct option to balance the chemical equation

2 NO₂(g) + 4 H₂O() + O₂(g) → 4 HNO₃(aq) + H₂O(l)

In order to balance the equation, we need equal numbers of atoms on both sides of the equation. By adding 4 H₂O molecules on the left side, we ensure that there are 4 hydrogen and 2 oxygen atoms on each side. This balances the equation.