Question

Determine the empirical formula of a compound that contains 69.5% oxygen and 30.5% nitrogen, and then determine the molecular formula. The molar mass of the molecular formula is 138.06g/mol.

Answer 1

NO2

Step-by-step explanation:

the molar mass of oxygen = 138.06 x 0.695 = 95.9517

=> 95.9517/16 = 6

the molar mass of nitrogen = 138.06 x 0.305 = 42.1083

=> 42.1083 / 14 = 3

So there are 3 N and 6 O => N3O6 which is simplified empirically as NO2