Percentage of C, H & N in a compound is given as follows:
C=40%; H=13.33%; N=46.67%

The empirical formula of the compound will be:
1. $C{H}_{2}N$
2. $C_2{H}_{4}N$
3. $C{H}_{4}N$
4. $C{H}_{3}N$

A compound is composed of carbon, hydrogen, and oxygen. The percentage composition by mass is 40% carbon and 6.67% hydrogen, with the remaining percentage being oxygen. Determine the empirical formula of the compound:

1. $C{H}_{2}O$

2. $C{H}_{4}O$

3. $C{H}_4{O}_2$

4. $C{H}_{\mathrm{}}O$

The percentages of C, H, and N in an organic compound are 40%, 13.3%, and 46.7% respectively.
The empirical formula of the compound is: