Step-by-step explanation:
The compound is found to be composed of 75% carbon and 25% hydrogen.
100 g of the compound contains 75 g of carbon and 25 g of hydrogen.
The atomic masses of carbon and hydrogen are 12 g/mol and 1 g/mol respectively.
The number of moles of C =
12 g/mol
75 g
= 6.25 moles
The number of moles of H =
1 g/mol
25 g
= 25 moles
The mole ratio C:H=6.25:25=1:4
The empirical formula of the compound is CH
4
.