
Claire H. answered 11/18/20
Experienced chemistry tutor
For every one mole of NH3 to be produced, you must use one and a half moles of H2. The excess N2 signifies the limiting molecule in this reaction is the Hydrogen Gas. Therefore, 15 moles of H2 divided by 1.5 moles H2 needed for the product equals 10 moles NH3.