Can multiple people use one account at the same time on a computer??

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

Rate law for this reaction israte of the reaction = k[a]²[b].second order in a  means concentration of a in power of two, and  first order in b means concentration of b in power of one.

Ithink the answer is d.