For the reaction `2NO_(2)+F_(2)rarr 2NO_(2)F`, following mechanism has been provided:
`NO_(2)+F_(2) overset("slow")(rarr) NO_(2)F+F`
`NO_(2)+Foverset("fast")(rarr) NO_(2)F`
Thus rate expression of the above reaction can be writtens as:

Options

A. `r=k[NO_(2)]^(2)[F_(2)]`
B. `r=k[NO_(2)]`
C. `r=k[[NO_(2)][F_(2)]`
D. `r=k[F_(2)]`

Answer

3

Explanation

Rate is given by the slowest step of the reaction so rate is `r=k[NO_(2)][F_(3)]`.