Question

how do the electrons flow within a voltaic cell? the electrons flow from the anode to the cathode across the voltmeter. from the right beaker to the left beaker through the air. across the salt bridge. from the cathode to the anode across the voltmeter.

Explanation:

In a voltaic cell, oxidation occurs at the anode (electrons are released) and reduction at the cathode (electrons are accepted). Electrons flow through the external circuit (like the voltmeter) from the anode (where they are produced) to the cathode (where they are consumed). Electrons do not flow through the air (as in the second option) or the salt bridge (which allows ion flow, not electron flow). The fourth option has the direction reversed. So the correct path is from anode to cathode across the voltmeter.

Answer:

A. from the anode to the cathode across the voltmeter.