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

An organic compound on analysis gave the following results: $C = 54.5\%$,$O = 36.4\%$,$H = 9.1\%$. The empirical formula of the compound is:

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

Caffeine has a molecular weight of $194 \text{ g/mol}$. If it contains $28.9\%$ by mass of nitrogen, the number of atoms of nitrogen in one molecule of caffeine is:

In an organic compound,the percentage of $C$ is $92.3 \%$. What is its empirical formula?

An organic compound having molecular mass $60$ is found to contain $C = 20\%$,$H = 6.67\%$,and $N = 46.67\%$,while the rest is oxygen. On heating,it gives $NH_3$ along with a solid residue. The solid residue gives a violet color with alkaline copper sulphate solution. The compound is: