Question

which of the following would most likely decrease the rate of gasoline burning? c₈h₁₈ + o₂ → co₂ + h₂o
adding a catalyst
increasing the concentration of gasoline
decreasing the concentration of oxygen in the air.
increasing the temperature

Explanation:

Catalysts increase reaction rates. Increasing gasoline concentration or temperature generally speeds up the reaction. Oxygen is a reactant in gasoline - burning (combustion). Decreasing the concentration of a reactant (oxygen here) will slow down the reaction rate according to the rate - law principles in chemical kinetics.

Answer:

C. Decreasing the concentration of oxygen in the air