The formula of a substance is $(CO)_x$. If its vapor density is $70$,find the value of $x$.

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

$2.0 \text{ g}$ of a bromo hydrocarbon $(X)$ was subjected to Carius analysis, which gave $3.36 \text{ g}$ of $AgBr$. The percentage of carbon in the compound $(X)$ is $26.7\%$. The total number of carbon atoms in the empirical formula for compound $(X)$ is . . . . . . .

The empirical formula of a compound is $CH_2O$ and its molecular mass is $90$. The molecular formula of the compound is:

$A$ substance contains $52.2\%$ carbon,$13\%$ hydrogen,and $34.8\%$ oxygen. If the vapor density of the substance is $46$,find its molecular formula.

Urea is a better fertilizer than ammonium sulphate because