Number of volumes of Oxygen that gives 4 volumes of Ozone is

The balanced chemical equation for the formation of ozone from oxygen is:

3O₂ → 2O₃

This means that for every 3 volumes of oxygen, 2 volumes of ozone are produced. So, to produce 4 volumes of ozone, we can use the following proportion:

3 volumes of O₂ / 2 volumes of O₃ = x volumes of O₂/ 4 volumes of O₃

Cross-multiplying, we get:

3 volumes of O₂x 4 volumes of O₃ = 2 volumes of O₃x x volumes of O₂

Simplifying, we get:

12 volumes of O₂ = 2x volumes of O₂

Dividing both sides by 2, we get:

x = 6 volumes of O₂

Therefore, 6 volumes of oxygen will react to produce 4 volumes of ozone.