# A compound has a molecular mass of 54 and an empirical formula of C_2H_3. What is the molecular formula of the compound?

Feb 19, 2016

proceed as follows

#### Explanation:

let the MF be$\left({C}_{2} {H}_{3}\right) n$
using atomic mass of C =12
and of hydrogen H =1
the calculated Molar mass becomes (2x12+3x1)n =27n
so 27n = 54
hen n =2
So MF Will be ${C}_{4} {H}_{6}$