For a reaction N2 + 3H2 → 2NH3, the rate of formation of ammonia was found to be 2.0 × 10-4 mol dm-3 s-1. The rate of consumption of H2 will be
1.0×10−4mol dm−3 s−1
2.0×10−4 mol dm−3 s−1
3.0×10−4 mol dm−3 s−1
4.0×10−4mol dm−3 s−1
We will have −dN2dt=−13dH2dt=12dNH3dt
It is given that dNH3dt=2×10−4moldm−3s−1. Hence, −dH2dt=32dNH3dt=3×10−4moldm−3s−1