No. Nitrogen dioxide is a compound of nitrogen an oxygen, meaning that the two elements are chemical bonded together to form a different chemical with its own unique set of properties. In a mixture...
No, one mole of each, having the same VOLUME (about 22.4 L at STP), differ though in their masses: 32 g/mol for O2 and 28 g/mol for N2 So their densities (mass per volume) also differ in the same...