The unit of atomic weight is

The equivalent weight of $H_3PO_4$ in the following reaction is: $H_3PO_4 + Ca(OH)_2 \to CaHPO_4 + 2H_2O$

The phosphate of a metal $M$ has the formula $M_3(PO_4)_2$. What is the formula for its sulphate?

Statement $1$: The equivalent mass of $Cu$ in $CuO$ is $63.6$ and in $Cu_2O$ is $31.8$. Statement $2$: Equivalent mass = $\frac{\text{Molecular mass}}{\text{Valency}}$

$1 \ u \ (amu)$ is equal to

Calculate the molecular mass of a glucose $C_{6}H_{12}O_{6}$ molecule.