CR circuit analysis (AC) Serial and Parallel

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Joined Mar 18, 2010
For circuit consisting or unknown Capacitor and Resistor, I have the impedance (R + iX) and I want to know the capasitance of the capacitor.

When the circuit items are serial, is this the way to go?

The equation Xc = 1/(ωC) || *C and || :Xc

Turns into C = Xc/ω

And the Xc is the same thing as the iX of the resistance.

But I don't know if it my transformation of the formula is ok, since the C and Xc are imaginary,
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