Which of the following statements is true concerning the electrochemical cell depicted below? Zn | Zn2+(aq) || Cu2+(aq) | Cu? Zn2+(aq) + 2e− Zn(s); E° = –2.87 V

Cu2+(aq) + 2e− Cu(s); E° = –2.38 V

a. The cell reaction is spontaneous with a standard cell potential of 0.49 V

b. The cell reaction is nonspontaneous with a standard cell potential of -0.49 V

c. The cell is at equilibrium

d. The cell reaction is spontaneous with a standard cell potential of 5.25 V

e. The cell reaction is nonspontaneous with a standard cell potential of -5.25 V

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible? a. attractive forces between gas particles are negligible because the particles of an ideal gas are moving so quickly. b. collisions between gas particles are elastic; there is no net gain or loss of kinetic energy. c. gases consist of a large number of small particles, with a lot of space between the particles. d. gas particles are in constant, random motion, and higher kinetic energy means faster movement.

Aroller coaster car is traveling down a track at 22 m/s. the car has a mass of 2000 kg. what is the kinetic energy of the car? a) 22,000 j b) 968,000 j c) 484,000 j d) 44,000 j

C3h8o3 - glycerol major species present when dissolved in water