What is the equivalent mass of oxalic acid $(H_2C_2O_4 \cdot 2H_2O)$?

What is the equivalent weight of methanol if one mole of $CH_3OH$ is combusted to form $CO$ and $H_2O$?

$74.5 \ g$ of a metallic chloride contains $35.5 \ g$ of chlorine. The equivalent mass of the metal is

$A$ mixture of $1.65 \times 10^{21}$ molecules of $X$ and $1.85 \times 10^{21}$ molecules of $Y$ weighs $0.688 \ g$. If the molecular mass of $Y$ is $187 \ g/mol$,what is the molecular mass of $X$?

Which symbol replaced the unit of atomic mass,$amu$?

The equivalent mass of iodine in the following reaction is $I_2 + 2S_2O_3^{2-} \longrightarrow 2I^{-} + S_4O_6^{2-}$