$1 \, g$ of hydrogen combines with $80 \, g$ of bromine,and $1 \, g$ of calcium combines with $4 \, g$ of bromine. What is the equivalent weight of calcium?

The specific heat of a solid element is $0.1 \text{ cal/g } ^\circ C$ and its equivalent weight is $31.8$. What is its atomic weight?

The ratio of the mass of '$x$' atoms of an element to the mass of '$x$' carbon atoms is $9:1$. Find the molar mass of the element if the molar mass of carbon is $12 \text{ g/mol}$. (in $\text{ g/mol}$)

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

The equivalent weight of a metal is $4.5$ and the molecular weight of its chloride is $80$. The atomic weight of the metal is

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