EX2 Given reaction 4A=B, which has time-independent stoichiometry and kinetic equation r=k[A]n. When 20% of reactant A is consumed, then the consumption rate of A(dtd[A]=kA[A]n) is measured to be equal to 4103moldm3s1, while when 80% of reactant A is consumed, then the consumption rate of A is measured equal to 2.5104moldm3s1. Find the order of the reaction