Nitrogen dioxide `(NO_(2))` reacts with fluroine `(F_(2))` to form nitryl fluroide `(NO_(2)F)` according to the reaction.
`2NO_(2)(g) + F_(2) to 2NO_(2)F(g)`
Write the instaneous rate of reaction in terms of
i) rate of formation of `NO_(2)F`,
ii) Rate of disappearance of `NO_(2)`,
iii) rate of disappearance of `F_(2)`

Answer

(i) `+(1)/(2)(d[NO_(2)F])/(dt)` (ii) `-(1)/(2)(d[NO_(2)])/(dt)` (iii) `-(d[F_(2)])/(dt)`