Chemistry help please? PLEASE explain your answers, thanks!?

Hi---Could someone please help me??? I am struggling! PLEASE explain your answers so I can follow you. Thanks to all. All help is greatly appreciated! :) An oxide of nitrogen contains 30.45 mass % of N. (a)What is the empirical formula of the oxide? (b)If the molar mass is 90 ± 5 g/mol, what is the molecular... show more Hi---Could someone please help me??? I am struggling! PLEASE explain your answers so I can follow you. Thanks to all. All help is greatly appreciated! :)

An oxide of nitrogen contains 30.45 mass % of N.
(a)What is the empirical formula of the oxide?
(b)If the molar mass is 90 ± 5 g/mol, what is the molecular formula?
3 answers 3