Chemistry Question from JEE Main 2023 · 11 April, Shift 1

$\mathrm{KClO_3 + 6FeSO_4 + 3H_2SO_4 \rightarrow KCl + 3Fe_2(SO_4)_3 + 3H_2O}$ The above reaction was studied at $300 \, \text{K}$ by monitoring the concentration of $\mathrm{FeSO_4}$, in which initial concentration was $10 \, \text{M}$ and after half an hour became $8.8 \, \text{M}$. The rate of production of $\mathrm{Fe_2(SO_4)_3}$ is _____ $\times 10^{-6} \, \text{mol L}^{-1} \, \text{s}^{-1}$