Calculate the equivalent mass of each oxidant and reductant in:

${\mathrm{Na}}_2{\mathrm{SO}}_3+{\mathrm{Na}}_2{\mathrm{CrO}}_4⟶{\mathrm{Na}}_2{\mathrm{SO}}_4+\mathrm{Cr}(\mathrm{OH}{)}_3$

Calculate the equivalent mass of each oxidant and reductant in:

${\mathrm{Fe}}_3{\mathrm{O}}_4+{\mathrm{KMnO}}_4⟶{\mathrm{Fe}}_2{\mathrm{O}}_3+{\mathrm{MnO}}_2$

Calculate the equivalent mass of each oxidant and reductant in:

$\mathrm{KI}+{\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7⟶{\mathrm{Cr}}^{3+}+3{\mathrm{I}}_2$

Calculate the equivalent mass of each oxidant and reductant in: ${\mathrm{Mn}}^{4+}⟶{\mathrm{Mn}}^{2+}$.

Calculate the equivalent mass of each oxidant and reductant in:

${\mathrm{NO}}_3^{-}⟶{\mathrm{N}}_2$

Calculate the equivalent mass of each oxidant and reductant in:

${\mathrm{N}}_2⟶{\mathrm{NH}}_3$

Calculate the equivalent mass of each oxidant and reductant in:

${\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3+{\mathrm{I}}_2⟶{\mathrm{Na}}_2{\mathrm{S}}_4{\mathrm{O}}_6+2\mathrm{NaI}$

Calculate the equivalent mass of each oxidant and reductant in:

${\mathrm{FeC}}_2{\mathrm{O}}_4⟶{\mathrm{Fe}}^{3+}+{\mathrm{CO}}_2$

Stannous ion is oxidised by the dichromate ion in acidic solution as $3{\mathrm{Sn}}^{2+}+14{\mathrm{H}}^{+}+{\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}⟶3{\mathrm{Sn}}^{4+}+2{\mathrm{Cr}}^{3+}+7{\mathrm{H}}_2\mathrm{O}$

If, $Sn{\mathrm{Cl}}_2$ is the source of ${\mathrm{Sn}}^{2+},$ how many grams of ${\mathrm{SnCl}}_2$ would be contained in $2 \mathrm{litres}$ of $0.1$ $\mathrm{N}$ solution?