Which has the greatest molecular kinetic energy? a. salt dissolving in water b. water vapor condensing into raindrops c. exhaust gases flowing from a car's tailpipe d. sugars traveling through a person's bloodstream

C. exhaust gases flowing from a car's tailpipe

Explanation:

As gases have a submicroscopic particle all of which are rapid and constant in motion.  There properties such as pressure-temperature and viscosity by considering there molecular composition and motion is thus the greatest kinetic energy.  The collision of particles thus is fastest in these when blowing through an exhaust in a car's tailpipe.