Which statement best describes a battery?
a) identical cells are arranged in the same orientation to increase the energy output.
b)identical cells are arranged in opposite orientations to reverse the half reactions. c)different cells are arranged in the same orientation to increase the energy output. d)different cells are arranged in opposite orientations to reverse the half reactions.

The correct answer is option A.

Explanation:

Batteries are connected group of electrochemical cells that stores electrical charges and generate electric current due to conversion of chemical energy into electrical energy.

These electrochemical cells are arranged in a same orientation so as to keep the polarities of the cells in same direction which will provide ease in movement of electrical charges. Preferably these electrochemical cells are identical.

the answer for sodium is 0.186

the answer for rubidium is 0.251

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.