Determine the percent composition of the compound that forms when 222.6 g of N combines with 77.4 g of O.

Ok so co(g) is not pronoused that. the only clue is that youpronouse it the oppisote way. 

Using dilution equationm1v1 =m2v2 ; where m1 and m1 are the intiial and final concentration, and v1 and v2 are the initial and final volume.5  × 5 m = 8 l  × m2m2 = 25/8 = 3.125 mtherefore; the resulting molarity is 3.125 m