Problem 3. [0.7 pt] Sometimes in the literature, scientists and engineers like to use pressure instead of concentration to describe the limiting species. It is particularly convenient for the gas phase reactions. For a gas phase reaction at 350C, the rate is given as rA=dtdPA=4.7PA2,atm/hr (a) [0.25pt] What are the units of the rate constant 4.7? (b) [0.5 pt] What is the value of the rate constant, k, for this reaction if we want to convert the rate equation to: rA=V1dtdNA=kCA2,mol/(m3s)