Question: How many (mathrm{Ca}^{2+}) ions cross the membrane/solution boundary corresponding to a (0.050 mathrm{~V}) increase in potential for a sensor with a (0.090 mathrm{~cm}^{2}) area assuming

How many $\mathrm{Ca}^{2+}$ ions cross the membrane/solution boundary corresponding to a $0.050 \mathrm{~V}$ increase in potential for a sensor with a $0.090 \mathrm{~cm}^{2}$ area assuming a capacitance of $3 \times 10^{-6} \mathrm{~F} / \mathrm{cm}^{2}$ ?

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