A student breathes in and out through the tube P in the apparatus illustrated (i) Name a liquid in the test tubes, which would detect a difference in composition between inhaled and exhaled air. (ii) After a minute or two of breathing, how would the liquids in tubes A and B differ in appearance?

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