Given the balanced equation, 2SO_2 + O_2 -> 2SO_3 , what is the molar ratio of O_2 to SO_3? Chemistry Stoichiometry Mole Ratios 2 Answers David G. May 1, 2016 One mole of O_2 will produce two moles of SO_3, so the mole ratio is 1:2. Answer link Edmund Liew May 1, 2016 If one mole of O_2 gives you 2 moles of SO_3, then the mole ratio between O_2 : SO_3 is 1 : 2 Answer link Related questions Question #a106e Question #e2e86 Question #a1072 Question #c5bf1 Question #dc373 Question #c5bf9 Question #a1076 Question #dc377 Question #b984f Question #19ea3 See all questions in Mole Ratios Impact of this question 5137 views around the world You can reuse this answer Creative Commons License