What is the sum of the coefficients in the combustion reaction of heptane?

Heptane is an alkane (saturated hydrocarbon) with the formula C7H16. The combustion reaction is the interaction with oxygen.
The reaction equation for the combustion of heptane is as follows:
2C7H16 + 22O2 = 14CO2 + 16H2O
Left: 14 carbon, 32 hydrogen, 44 oxygen. Right: 14 carbon, 44 oxygen and 32 hydrogen. Therefore, the coefficients are placed correctly.
Answer: the sum of the coefficients in the reaction is 2 + 22 + 14 + 16 = 54.

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