Chemistry - Chemical Kinetics Question with Solution | TestHub

The reaction between ${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}$ and ${\mathrm{HNO}}_2$ in an acidic medium is

${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}+3{\mathrm{HNO}}_2+5{\mathrm{H}}^{+}⟶2{\mathrm{Cr}}^{3+}+3{\mathrm{NO}}_3^{-}+4{\mathrm{H}}_2\mathrm{O}$

The rate of disappearance of ${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}$ is found to be $2.4\times 10^{-4}mol{L}^{-1}{s}^{-1}$ at a given time. What will be the rate of disappearance of ${\mathrm{HNO}}_2$ in mol L^–1 s^–1at the same time?