Question

Determine the empirical and molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48 oxygen. The molecular weight is 194.19 g/mol.

Answer 1

The atomic masses of C, H, N and O are 12 g/mol, 1 g/mol, 14 g/mol and 16 g/mol respectively.

From given percent composition, we can say that 100 g of compound will contain 49.48 g of C, 5.19 g of H, 28.85 g of N and 16.48 g of O.

Number of moles of

Number of moles of

Number of moles of

Number of moles of

The mole ratio

The empirical formula is

The empirical formula mass is

The molecular formula mass is 194.19 g/mol

The value of

Molecular formula is