<p>100 mL of 0.3 M HCl solution were mixed with 200 mL of 0.6 N&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>H</mi><mn>2</mn></msub><mi>S</mi><msub><mi>O</mi><mn>4</mn></msub></math>. The final acidic normality is:</p>