How is an electrolytic cell different from a galvanic cell? A. Galvanic cells have a voltage source added,
B. Electrons flow in the opposite direction,
C. The anode in an electrolytic cell is reduced,
D. Electricity does not flow in an electrolytic cell.

similar question : how can a galvanic cell become an electrolytic cell ?

answer : the redox reaction is reversed

a p e x

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

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.