HELP ASAP PLSSS 3 AND 4

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

List the path of the respiratory system

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