Question

percentage of carbon, hydrogen, nitrogen and oxygen are 62.07, 10.34, 14.0 and 13.59 respectively. if molecular mass is 114 , find molecular and empirical formula​

Answer 1

Answer:

Explanation:

100 g of compound will contain 62.07 g of C, 10.34 g of H, 14.0 g of N and 13.59 g of O.

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

The number of moles of C =  62.07g / 12g/mol  = 5.17mol

The number of moles of H =  10.34g  / 1g/mol  = 10.34 mol.

The number of moles of N =  14g  / 14g /mol = 1mol

The number of moles of O =  13.59 g  / 16g/mol = 0.85 mol.

The mole ratio C:H:N:O=5.17:10.34:1:0.85≃5:10:1:1

Hence, the empirical formula is C5 H10 NO

The empirical formula mass =5(12)+10(1)+14+16=100 g/mol

The ratio of molecular formula mass to empirical formula mass =  144/100 = 1.44

Hence, the molecular formula of organic compound is ( C5 H10 NO)1.44