Question

An organic compound has the empirical formula ch2. if the molar mass of the compound is 224.43 g/mol, what is the molecular formula of the compound?

Answer 1

calculate the mass of the empirical formula 

C= 12
H=1
CH2 =12+2 = 14 
divide the molar mass by the mass of the empirical formula
224.43/14= 16
then the molecular formula will be 16 times the empirical formula

(CH2)16
or 
C16 H32