The balanced symbol equation for copper(II) oxide reacting with hydrogen is:

CuO(s) + H₂(g) → Cu(s) + H₂O(g)

Here's a breakdown:

* CuO(s) represents copper(II) oxide in its solid state.

* H₂(g) represents hydrogen gas.

* Cu(s) represents copper in its solid state.

* H₂O(g) represents water vapor.

This equation shows that one mole of copper(II) oxide reacts with one mole of hydrogen gas to produce one mole of copper and one mole of water vapor.