Consider 80.0-g samples of two different compounds consisting of only carbon and oxygen. one of the compounds consists of 21.8 g of carbon, and the other has 34.3 g of carbon. determine the ratio in whole numbers of the masses of carbon that combine with 1.00 g of oxygen between the two compounds.

Explanation:

First, detemine the mass of oxygen in the two samples by difference:

Item                     Compound 1                        Compound 2

Sample                80.0 g                                    80.0 g

Carbon                 21.8 g                                    34.3 g

Oxygen:               80.0 g - 21.8g = 58.2 g         80.0 g - 34.3 g = 45.7 g

Second, determine the ratios of the masses of carbon that combine with 1.00 g of oxygen:

Sample              Mass of carbon that combines with 1.00 g of oxygen            

Compound 1      21.8 g / 58.2 g =  0.375

Compound 2     34.3 g / 45.7 g = 0.751

Third, determine the ratio of the masses of carbon between the two compounds.

what are the choices?

4d^55s^1 ( third choice)