The molecular mass of sucrose $(C_{12}H_{22}O_{11})$ is (in $g/mol$)

Write the formulae for the following compounds:
$(a)$ Mercury $(II)$ chloride
$(b)$ Nickel $(II)$ sulphate
$(c)$ Tin $(IV)$ oxide
$(d)$ Thallium $(I)$ sulphate
$(e)$ Iron $(III)$ sulphate
$(f)$ Chromium $(III)$ oxide

The atomic weight of $Ne$ is $20.2$. It is a mixture of $Ne^{20}$ and $Ne^{22}$. What is the relative abundance of the heavier isotope (in $\%$)?

An appropriate method for molecular weight determination of chloroform $(CHCl_3)$ is:

Suppose two elements $X$ and $Y$ combine to form two compounds $XY_{2}$ and $X_{2}Y_{3}$. If $0.05 \ mol$ of $XY_{2}$ weighs $5 \ g$ while $3.011 \times 10^{23}$ molecules of $X_{2}Y_{3}$ weighs $85 \ g$,then atomic masses of $X$ and $Y$ are respectively :

The equivalent mass of a metal is $29.73$ and the vapour density of its chloride is $130.4$. Find out the atomic mass of the metal.