NO₂ required for a reaction is produced by the decomposition of N₂O₅ in CCl₄ as per the equation,
2N₂O₅(g) 4NO₂(g) + O₂(g).
The initial concentration of N₂O₅ is 3.00 mol L^–1
and it is 2.75 mol L^–1
after 30 minutes. The rate of
formation of NO₂ is :