An organic compound contains $75\%$ (by weight) carbon and the remaining percentage is hydrogen. The correct option for the empirical formula of this compound is: [Atomic weight of $C = 12$, $H = 1$]

The percentage composition of carbon by mole in methane is ........... $ \% $

Which of the following is the formula for calcium chlorite?

The empirical formula of a compound is $CH$. Its molecular weight is $78$. The molecular formula of the compound will be

Define Percentage Composition in a compound.

Complete combustion of $750 \ g$ of an organic compound provides $420 \ g$ of $CO_2$ and $210 \ g$ of $H_2O$. The percentage composition of carbon and hydrogen in the organic compound is $15.3$ and ............. respectively. (Round off to the Nearest Integer)