18. During the electrolysis of an aqueous solution of Na2SO4 in an electrolyzer with platinum electrodes, hydrogen is released at the cathode, and oxygen at the anode. What volume of the explosive mixture will be obtained if a current of 2 A is passed for 2400 s at a temperature of 298 K and a pressure of 1.013 * 105 Pa? Answer: 0.92 dm3.

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