The combustion of ethylene proceeds by the reaction C₂H₄(g) + 3O₂(g) → 2CO₂(g) + 2H₂O (g)
When the rate of disappearance of O₂is 0.23 M s^-¹, the rate of disappearance of C₂H₄is
M s^-¹.

Question

Quizplus · Accepted Answer

From the balanced chemical equation, we can see that the stoichiometric coefficient of O2 is 3, which means that three moles of O2 are consumed per mole of C2H4. Thus, the rate of disappearance of C2H4 is one-third of the rate of disappearance of O2 (since one mole of C2H4 reacts with three moles of O2). 
So, if the rate of disappearance of O2 is 0.23 M/s, then the rate of disappearance of C2H4 is (0.23 M/s)/3 = 0.077 M/s. Therefore, the correct answer is C.

The Combustion of Ethylene Proceeds by the Reaction C2H4 (g)

The Combustion of Ethylene Proceeds by the Reaction C₂H₄(g)