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

Urea is a better fertilizer than ammonium sulphate because

How much copper can be obtained from $100 \, g$ of copper sulphate $(CuSO_{4})$?

What is the mass percent of oxygen in ethanol $(C_2H_5OH)$ (in $\%$)?

The empirical formula of a compound is $C_2H_5O$ and its molecular weight is $90$. The molecular formula of the compound is:

An organic compound is estimated through the Dumas method and is found to evolve $6$ moles of $CO_2$,$4$ moles of $H_2O$,and $1$ mole of nitrogen gas. The formula of the compound is