The empirical formula of an acid is $CH_2O_2$. The molecular formula of this acid will be .....

The value of $n$ in the molecular formula $Be_n Al_2 Si_6 O_{18}$ is

In a compound formed by element $X$ (atomic mass = $75$) and element $Y$ (atomic mass = $16$),if the percentage of $X$ is $75.8\%$,what will be its empirical formula?

The elemental composition of a compound is $54.2 \% C$,$9.2 \% H$,and $36.6 \% O$. If the molar mass of the compound is $132 \ g \ mol^{-1}$,the molecular formula of the compound is: [Given: The relative atomic mass of $C:H:O = 12:1:16$]

$A$ compound possesses $8\%$ sulphur by mass. The least molecular mass is

$A$ compound $(60 \ g)$ on analysis gave $C = 24 \ g$,$H = 4 \ g$,$O = 32 \ g$. Its empirical formula is