The activation energy of the reaction 2HI_(g) ⟶ H_2(g) +I_2(g) is 209.5 KJ mol^-1 at 581 K. Calculate the fraction of molecules of reactants having energy equal to or greater than activation energy.

The decomposition of NH₃ on platinum surface is zero order reaction what are the rates of production of N₂ and H₂ if k = 2.5 x10^-4 mol + L S^-1.

What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?

Calculate the half-life of a first order reaction from their rate constants given below.
(i) 200 S^-1
(ii) 2 min^-1
(iii) 4 years^-1

Write the differences between rate and rate constant of a reaction.