Two isotopes are known for Nitrogen. 99.63% of all the atoms of Nitrogen weight 14.003074 amu. The other 0.37% weights 15.000108 amu. Find the average atomic mass of Nitrogen.

Consider the following multistep reaction: a b→ab(slow) a ab→a2b(fast)−−−−−−−−−−−−−−−−− 2a b→a2b(overall) based on this mechanism, determine the rate law for the overall reaction. express your answer in standard masteringchemistry format. for example, if the rate law is k[a]3[b]2 type k*[a]^3*[b]^2