Using C = 12 and O = 16, approximately how much oxygen does carbon monoxide contain for each 1.00 g of carbon?

Explanation

Carbon monoxide has formula CO, so it contains one oxygen atom for each carbon atom. Using the rounded atomic masses O = 16 and C = 12 gives an oxygen-to-carbon mass ratio of 16:12. Thus 1.00 g of carbon corresponds to approximately 1.33 g of oxygen.