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For the reaction NO2(g) +CO (g) to C...

For the reaction
` NO_2(g) +CO (g) to CO_2 (g) +NO (g)`
the experimentally determined rate expression below 400 K is: rate `=k [NO_2]^2`. What mechanism can be proposed for the above reaction ?

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Since given rate is : rate `= k [NO_2]^2`, proposed mechanism for the above reaction is:
` NO_2 +NO_2 to NO +NO_3 ` ( slow )
` NO_3 +CO to CO_2 +NO_2 `( fast)
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