In the reaction of 3NO2 + H2O + NO + 2HNO3, if 6.0 moles of NO2 are present how many moles of NO are produced?

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d