Question

The empherical formula of a compound CH2O.Its molecular weight is 90 calculate the molar formula for the compounds

Answer 1

Empirical formula = CH2O

Molecular mass of (CH2O) n = 90

Empirical formula mass

= 12g/mol + 2 g/mol + 16 g/mol

= 30 g/mol

n = Molecular formula mass/Empirical

formula mass

=90/30

= 3

Molecular formula = 3 × CH2O

= C3H6O3

HOPE YOU UNDERSTAND