Analysis of a gas indicated that 46.2 % of its mass was carbon and 53.8% of the mass was nitrogen.

Analysis of a gas indicated that 46.2 % of its mass was carbon and 53.8% of the mass was nitrogen.

At 25oC and 751 torr, 1.05 g of the gas occupies 0.500 L.

What is the molecular formula for the gas?

Question 4 options:

C2N2


CN


C2N3


C2N4

I do not believe that it is C2N3 or C2N4

here is a really good answer:
http://answers.yahoo.com/question/index?…

Molar mass of C2N2 = 52.0 g. % C = (24.0 g / 52.0 g) x 100 = 46.3 % C
% N = (28.0 g / 52.0 g) x 100 = 53.8 % N

Answer choice A is the correct answer!

Hope this helps!