Let us dive into the land of Westeros!
When the dragons of Danaerys the dragon queen burn their victims, the following reaction takes place:
2C+O2⟶2CO2
The average rate of reaction could be expressed as?
Let us look at the rate of reaction in full.
We saw that the reaction rate will be equal to the change in concentration of the participating species divided by the stoichiometric coefficients.
Also, we would have a minus sign in case of reactants and plus in case of products. This is done to make the rate always positive since change in concentration of reactants would be negative.
Therefore,