H₂SO₄ can be prepared in following two step

 process: [% yield of each step is indicated]

(P) $\mathrm{S}\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\stackrel{50 \mathrm{\%}\text{ yield }}{\to }{\mathrm{SO}}_2\left(\mathrm{g}\right)$

(Q) ${\mathrm{NO}}_2\left(\mathrm{g}\right)+{\mathrm{SO}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\stackrel{80 \mathrm{\&}\text{ yield }}{\to } {\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)+\mathrm{NO}\left(\mathrm{g}\right)$

What mass of sulphur is 1960 gm H₂SO₄ ?