An aqueous solution of Na₂SO₄ was electrolyzed for 30.0 min; 25.0 mL of oxygen was collected at the anode over water at 22°C and a total pressure of 722 Torr. Determine the current that was used to produce the gas. See Table 5A.2 for the vapor pressure of water.

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TABLE 5A.2 Vapor Pressure of Water Temperature/C 0 10 20 21 22 23 24 25 30 37* 40 60 80 100 Vapor pressure P/Torr 4.58 9.21 17.54 18.65 19.83 21.07 22.38 23.76 31.83 47.08 55.34 149.44 355.26 760.00