What is the sum of the coefficients in the reaction equation for the combustion of propane?

The propane combustion reaction itself:
C3H8 + 5O2 = 3CO2 + 4H2O + Q
Let’s take and add all the coefficients:
1 + 5 + 3 + 4 = 13
The sum of the coefficients in the reaction equation for the combustion of propane = 13
Answer: 13



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