Q = C*V
Q is the charge in coulombs.
C is the capacitance in Farads
V is the voltage in volts.
Q = ???
C = 180 * 10^-6 F
V = 120 V (I'm assuming DC here. If that's wrong, edit the question and offer more information. The next step is Calculus and if that's what you need, please say so.)
Q = C*V
Q =180 * 10^-6 * 120
Q = 0.0216 Coulombs.
