Chemistry - Mole Concept Question with Solution | TestHub

80 ml mixture of ${\mathrm{NH}}_3$ and ${\mathrm{H}}_2$ was completely decomposed by sparking at room temperature into ${\mathrm{N}}_2$ and ${\mathrm{H}}_2$. 55 $\mathrm{ml}{\mathrm{O}}_2$ was added and the mixture was sparked again. After cooling to the room temperature, the mixture was shaken with alkaline pyrogallol solution and the contraction of 6 ml was observed, the mol % of ${\mathrm{NH}}_3$ in the original mixture is xy%, then find the value of $\mathrm{x}+\mathrm{y}$.