Answer:
Step-by-step explanation:
The balanced chemical equation for the reaction between copper(II) oxide (CuO) and hydrogen gas (H2) to form water (H2O) and copper (Cu) is:
CuO + H2 → H2O + Cu
From the equation, we can see that 1 mole of CuO reacts with 1 mole of H2 to form 1 mole of H2O.
Therefore, if we start with 2 moles of CuO, we would need 2 moles of H2 to react completely and form 2 moles of H2O.
CuO + 2H2 → 2H2O + Cu
So, 2 moles of CuO would form 2 moles of H2O.