An organic compound contains `40%` carbon, `6.67%` hydrogen and `53.33%` oxygen by mass. What is the molecular formula of the compound if its molecular mass is 180?

Explanation

Ratio of moles of atoms, `C : H: O= 1: 2 : 1`
Empirical formula of compound `= CH_(2)O`
Empirical formula mass `=12+(2xx 1.008)+16= 30`
`n=(" Molar mass ")/(" Empirical formula mass ")= (180)/(30)= 6`
Molecular formula of compound `=(CH_(2)O)xx 6= C_(6)H_(12)O_(6)`