Two uncharged capacitors with capacitances \(C_1 = C\) and \(C_2 = 2C\) are connected in parallel across an ideal battery that maintains a constant potential difference \(V_0\). What is the equivalent capacitance \(C_{\text{eq}}\)` of the combination, and what is the ratio \(Q_2 / Q_1\) of the charge stored on capacitor 2 to the charge stored on capacitor 1?