Anatural gas mixture contains 90 wt.% methane, 3 wt.% n, and 3wt.% h2s and 4wt."co. if the atomic weight of c-12, h-1, n=14,0 16, s-32, calculate - c) the specific gravity of the mixture. assume mw of air 29 d) compressibility factor (z) at 75°f and 2010 psia.