Chemistry - Stoichiometry Question with Solution | TestHub

Nitric acid can be produced from ${\mathrm{NH}}_3$ in the following three steps (unbalanced)

I) ${\mathrm{NH}}_3(\mathrm{g})+{\mathrm{O}}_2(\mathrm{g})⟶\mathrm{NO}(\mathrm{g})+{\mathrm{H}}_2\mathrm{O}(\mathrm{g})$

II) $\mathrm{NO}(\mathrm{g})+{\mathrm{O}}_2(\mathrm{g})⟶{\mathrm{NO}}_2(\mathrm{g})$

III) ${\mathrm{NO}}_2(\mathrm{g})+{\mathrm{H}}_2\mathrm{O}(\mathrm{l})⟶{\mathrm{HNO}}_3(\mathrm{aq})+\mathrm{NO}(\mathrm{g})$

Percentage yield of 1st, 2nd and 3rd steps are 20%, 50% and x% respectively. If 630 gm of HNO₃ is produced by 600 moles of NH₃ at 1 atm and 273 K temperature, then the value of ‘x’ will be