Answer:

Explanation:
Hello,
In this case, complete combustions are chemical reactions transforming compounds into their respective highest-oxidized oxides, it means, that for the given compound, the carbon will have +4 as its oxidation state, forming carbon dioxide as well as sulfur which will have +6, forming sulfur trioxide. Do not forget water is also formed as an "oxide" of hydrogen. Thus, the aforementioned chemical reaction is:

Thus, since the impurity will be in same segregation state of the fuel, that is liquid, and oxygen and all the products are gaseous we have:

Finally, by balancing it, we then obtain:

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