Questions 1-3 refer to the following Lindemann-Hinshelwood mechanism for gas phase reactions: AP mechanism A+AkakaA+AAkbP 1. In the mechanism, A represents: Singlet excited molecule by light A radical intermediate Enzyme-substrate complex An activated molecule by collision QUESTION 2 Continue with the last question, which of the folloiwng equation represents the steady-state approximation? ka[A]2ka[A][A]kb[A]=0ka[A]ka[A][A]=02ka[A]ka[A][A]kb[A]=0ka[A]2kaa[A][A]=0 Continue with the last two questions regarding the gas phase reaction from A to product P, the final derived rate law is given below dtd[P]=kaI[A]+kbkakb[A]2 Under what condition it becomes a first order When the product P is at high pressure When more catalyst is added When almost all the reactant A is consumed When reactant A A is at high pressure