Question

Write the rate laws for the following elementary reactions. (Rate expressions take the general form: rate =k.[H₂].[Cl2].)
(a) N₂O₄(g )?2NO₂(g ) (b)NO₂(g )+SO₂(g )?NO(g )+SO₃(g ) (c)Cl(g )+ICl(g )?I(g )+Cl2(g ) (d)CH₂(g )+Cl₂(g )?CH₂Cl₂(g )