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Write the overall reaction and the rate ...

Write the overall reaction and the rate law equation from the following elementary steps:
`NOBr_(2)hArrNOBr`
`NOBr+NOrarr2NOBr`

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Adding both the steps, we get overall reaction, `2NO+Br_(2)+NOrarr2NOBr`
The second step is slow and, therefore, a rate determining step.
`r=k'[NOBr_(2)][NO]`
`K=([NOBr])/([No][Nr_(2)]) or [NOBr_(2)]=K[NO][Br_(2)]`
`r=k'K[NO]^(2)[Br]`
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