A gaseous oxide contains 30.4% of nitrogen, one molecule of which contains one nitrogen atom. The density of the oxide relative to oxygen gas is.........

Answer 1

A strange question.
I would start by determining the formula of the oxide.
N = 30.4%
O = 69.6%
moles N = 30.4/14 = ??
moles O = 69.6/16 = ??
determine ratio of mols to each other and divide molar mass of the oxide by 32 to obtain the density relative to oxygen. Post your work if you get stuck.