(2×+3)(×-4) can somebody me with this problem

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

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.

Nuclear decay is the spontaneous decay of one element into a. an x-ray b. a ray of light c. another element