A modern automobile engine creates various harmful gasses. Still, much of the emissions end up being harmless—especially once the car has been running for about five minutes on a temperate day. Attached to a car's exhaust pipe is a device consisting of platinum and palladium-coated onto a ceramic surface (beads or a honeycomb shape). What would you guess is going on here? Why might the device only work well after a car has been running for a while? Assess how you think factors such as temperature, concentration, and the presence of a catalyst affect the rate of a chemical reaction in this scenario.