During the mixing of 4 moles each of S O 2   a n d   O 2 gases are allowed to react to form S O 3 in a closed vessel. At equilibrium 25% of O 2 is used up. Calculate the total number of moles of all the gases at equilibrium is-

Step-by-step solution

                                                2 S O 2 i n i t i a l   m o l e s                         4 + O 2 4 ⇌ 2 S O 3 0 at equilibrium 4 − 2 n             4 − n           2 n ∴ x = 25 100 = .25 At equ