4nh3 + 5o2 -- 4no + 6h2o how many moles of oxygen gas are needed to react with 23 moles of ammonia

28.75 moles

Explanation:

Data Given:

no. of moles of ammonia (NH₃) = 23 moles

no. of moles of oxygen gas (O₂) = ?

Reaction given

                    4NH₃ + 5O₂ > 4NO + 6H₂O

Solution:

First we have to look at the reaction for moles details

                         4NH₃  +  5O₂  >  4NO  +  6H₂O

                         4 mol     5 mol

So,

if 4 moles of ammonia (NH₃) react with 5 moles of oxygen gas (O₂) so how many moles of oxygen gas (O₂) will be react with 23 moles of ammonia (NH₃).

Apply Unity Formula

                          4 moles of NH₃ ≅ 5 moles of O₂

                          23 moles of NH₃ ≅ X moles of O₂

Do cross multiply

                           moles of O₂  = 5 mol x 23 mol / 4 mol

                            moles of O₂  = 28.75 mol

So the no. of moles of O₂ that react with 23 moles of NH₃ = 28.75 mol

i think   the answer is c hope i'm right