A capacitor stores 7.6 × 10–11 C when the electric potential difference between the plates is 5.8 V.

The energy stored in a capacitor is U = ½QV. Substituting Q = 7.6 × 10⁻¹¹ C and V = 5.8 V gives U = ½(7.6 × 10⁻¹¹)(5.8) ≈ 2.2 × 10⁻¹⁰ J. The correct choice is 2.2 × 10⁻¹⁰ J.

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