Answer:
2moles of H2
Explanation:
First, let us generate a balanced equation for the reaction between calcium and water. This is illustrated below:
Ca + 2H20 —> Ca(OH)2 + H2
From the equation,
2moles of H2O produced 1mole of H2.
Therefore 4moles of H2O will produce = 4/2 = 2moles of H2.
