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Consider 81.0 g samples of two different compounds consisting of only carbon and oxygen. Compound 1 consists of 22.1 g of carbon, and compound 2 has 34.7 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.

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rspill6

Answer:

Compound 1:   CO2

Compound 2:  CO

Explanation:

The attachment illustrrates the calculations.  The masses of both C and O are converted into moles of those two elelements and the resulting mole values are taken as ratios of the two elements.  Compound 1 has twice as many moles of O as of C, so it's empirical formula must be CO2.  Compound 2's O/C ratio is 1, so it becomes CO.

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