Final answer:
The electrical energy stored in a 12-volt battery with 8.4 × 10³ coulombs of charge is calculated by multiplying the voltage by the charge, resulting in approximately 100.8 kJ of energy.
Step-by-step explanation:
The student is asking about the amount of electrical energy stored in a 12 volt automotive battery that has 8.4 × 10³ coulombs of electric charge. To calculate this energy, we use the formula for electric potential energy, which is energy (E) = voltage (V) × charge (Q). Given a voltage of 12 volts and a charge of 8.4 × 10³ coulombs, the energy stored in the battery can be calculated as E = 12 V × 8.4 × 10³ C, which equals to an energy content of 100.8 × 10³ joules or 100.8 kJ. It is important to note that this is a theoretical maximum and actual energy available might be less due to inefficiencies and the battery's internal resistance.