Which statement is not true for an electrochemical cell? An oxidation-reduction reaction must occur.

Electrons must flow through a separate path from the reaction solutions.

Nonparticipating ions must flow to keep the electrons electrically neutral.

The metals that form the electrodes must be identical.

The answer is c. 320 g

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.