J.R. S. answered 11/22/21
Ph.D. University Professor with 10+ years Tutoring Experience
4NH3 + 5O2 ==> 4NO + 6H2O ... balanced equation
Using dimensional analysis and the stoichiometry of the balanced equation, we have the following:
50.0 g O2 x 1 mol O2 / 32 g x 6 mols H2O / 5 mols O2 x 18 g H2O / mol = 33.8 g H2O