The equivalent weight of $Fe$ in $Fe_2O_3$ is $(Atomic \ mass \ of \ Fe = 56 \ g \ mol^{-1})$

In order to prepare one litre of a $1 \ N$ (normal) solution of $KMnO_4$,how many grams of $KMnO_4$ are required if the solution is to be used in an acidic medium for oxidation?

The equivalent weight of $FeS_2$ in the reaction $FeS_2 \to Fe_2O_3 + SO_2$ is (where $M$ is the molecular weight of $FeS_2$):

The equivalent weight of a divalent metal is $W$. The molecular weight of its chloride is...

What will be the mass of one atom of ${}^{12}C$?

The oxide of a metal has the molecular formula $M_2O_3$. If the equivalent mass of the metal is $9$,what is the molecular mass of the oxide?