Question

5.Suppose NH3 and O2 react to produce H2O, and a nitrogen oxide which contains 63.65% nitrogen by mass. Complete the reaction equation by entering the coefficients of the reactants and products and also the empirical formula of the nitrogen oxide product.

NH3+O2--> H2O+___

Answer 1

NH₃ + O₂     N₂O + H₂O

there are
N-1 N-1
H-3 H-2
O-2 O-3

BALANCED

N-1 ---- 2 N-1 ---- 2
H-3 ---- 6 H-2 ---- 6
O-2 ---- 7 O-3 ---- 7

IT SHOULD LOOK LIKE THIS

2 NH₃ + 3.5 O₂    2 NO₂ + 3 H₂O


BUT YOU CANT HAVE A DECIMAL (3.5) SO YOU HAVE TO GET RID OF IT BY MULTIPLYING ALL THE CORFFICIENTS BY 2

SO YOU SHOULD GET

N-1 ---- 2 ---- 4 N-1 ---- 2 ---- 4
H-3 ---- 6 ---- 12 H-2 ---- 6 ---- 12
O-2 ---- 7 ---- 14 O-3 ---- 7 ---- 14

4 NH₃ + 7 O₂      4 NO₂ + 6 H₂O

NOW YOU HAVE A BALANCED EQUATION WITH NO DECIMALS.