What larger energy does light energy come from?

What is important to study for nios grade 12 chemistry? i have only one month left.

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

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