Sulphur forms the chlorides $S_2Cl_2$ and $SCl_2$. The equivalent mass of sulphur in $SCl_2$ is $...$ $g/mol$.

Which of the following properties of an element is not variable?

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

$5 \, mol$ of $AB_2$ weigh $125 \times 10^{-3} \, kg$ and $10 \, mol$ of $A_2B_2$ weigh $300 \times 10^{-3} \, kg$. The molar mass of $A$ $(M_A)$ and molar mass of $B$ $(M_B)$ in $kg \, mol^{-1}$ are:

$NaOH + H_3PO_4 \to NaH_2PO_4 + H_2O$; What is the equivalent weight of phosphoric acid in this reaction?

Mass of one molecule of oxygen in $amu$ and in $gram$ respectively is