The rate constant, \( k \), of a zero order reaction \( 2 \text{NH}_3 (g) \xrightarrow{P_{1130K}} \text{N}_2 (g) + 3 \text{H}_2 (g) \) is \( y \times 10^{-4} \, \text{mol} \, \text{L}^{-1} \, \text{s}^{-1} \). The rate of formation of hydrogen (in mol L\(^{-1}\) s\(^{-1}\)) is