If the oxygen concentration is increased 4 times, the reaction rate 2H2S + 5O2 = 2S + 2H2O will change.

If we assume that the presented reaction is elementary, then the reaction rate will be determined by the kinetic equation. There was an oxygen concentration – [O2], became 4 [O2]. Let’s substitute in the kinetic equation: (4 [O2]) ^ 5 = (4 ^ 5) * ([O2] ^ 5) = 1024 * [O2] ^ 5.
Answer: the reaction speed will increase by 1024 times

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