List out the elements present in the compound, that is, Carbon and Hydrogen.
Carbon (C) Hydrogen (H)
divide by 120/12 = 30.3 /1 =
the RAM 10 30.3
divide by 10/10 30.3/10 =
smallest 1 3.03
answer
do the ratio 1 : 3 (approximately)
Empirical formula = CH3