Chemical Kinetics

The rate constant, $k$ of a zero order reaction $2 \mathrm{NH}_3(g) \xrightarrow[1130 \mathrm{~K}]{\mathrm{Pt}} \mathrm{N}_2(g)+3 \mathrm{H}_2(g)$ is $y \times 10^{-4} \mathrm{molL}^{-1} \mathrm{~s}^{-1}$. The rate of formation of hydrogen (in $\mathrm{molL}^{-1} \mathrm{~s}^{-1}$ ) is