When carbon is burned in air, it reacts with oxygen to form carbon dioxide. when 27.6 g of carbon were burned in the presence of 86.5 g of oxygen, 12.9 g of oxygen remained unreacted. what mass of carbon dioxide was produced? express your answer to one decimal place and include the appropriate units.

The answer to your question is: 101.2 g of CO2

Explanation:

C = 27.6 g

O₂ = 86.5 g   remained 12.9 g

O₂ that reacted = 86.5 - 12.9 = 73.6 g

                     C     + O₂      ⇒        CO₂      The equation is balanced

                    27.6    73.6                 ?

MW               12        32                  44

Rule of three

                        12 g of C  44 g  CO2

                       27.6 g C      x

                  x = 27.6(44)/12 = 101.2 g of CO2

                       32 g of O2    44 g of CO2

                        73.6 g of O2      x

                  x = 73.6(44)/32 = 101.2 g of CO2

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