The reaction equation Zn + 2HCl => ZnCl₂ + H₂ shows a 1:1 mole ratio between Zn and molecular hydrogen (H₁). Therefore, the moles of Zn consumed in the reaction is then equal to the moles of H₂ produced. In this case using 3 moles Zn => 3 moles H₂ will be produced.
