Seudónimo Seudónimo 28-02-2020 Chemistry contestada If you have 5 moles of H2, how many moles of O2 will you need to use up all of the H2 without having any reactants leftover ? Question 4 options: 0.4 moles O2 5 moles O2 2.5 moles O2 10 moles O2