A 1.5 volt battery will increase the potential energy of ________________ coulombs of charge by 0.18 joules.

To determine the number of coulombs of charge, we can use the equation:

Potential Energy (in joules) = Voltage (in volts) x Charge (in coulombs)

Given that the potential energy is 0.18 joules and the voltage is 1.5 volts, we can rearrange the equation to solve for the charge:

Charge = Potential Energy / Voltage

Substituting the values, we have:

Charge = 0.18 joules / 1.5 volts

Calculating this, we find:

Charge = 0.12 coulombs

Therefore, a 1.5-volt battery will increase the potential energy of 0.12 coulombs of charge by 0.18 joules.