Use the balanced equation, 2H2 + O2 ------> 2H2 O to determine how many moles of hydrogen gas would be required to produce 25 moles of H2 O.

Answer 1

2H₂ + O₂ ==> 2H₂O .. balanced equation

Use stoichiometry of the balanced equation and dimensional analysis to solve this problem:

25 moles H₂O x 2 moles H₂ / 2 moles H₂O = 25 moles H₂ gas required