$A$ compound contains $2.2 \ g$ of phosphorus and $1.24 \ g$ of sulfur. What is its empirical formula?

An organic compound containing carbon and hydrogen has an empirical formula of $CH_2$. The mass of $1 \ L$ of this organic gas is equal to the mass of $1 \ L$ of $N_2$ gas at the same temperature and pressure. What is the molecular formula of the organic gas?

Empirical formula of a compound is $CH_2O$ and its vapour density is $30$. The molecular formula of the compound is:

The empirical formula of a compound is $CH_2$. If the molar mass of the compound is $42 \ g/mol$,what is its molecular formula?

Actual number of atoms of different elements present in a molecule of a compound is given by

$0.01 \ mol$ of an organic compound $(X)$ containing $10\%$ hydrogen,on complete combustion produced $0.9 \ g \ H_2O$. Molar mass of $(X)$ is $.......... \ g \ mol^{-1}$.