<p>A compound&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>H</mi><mn>2</mn></msub><mi>X</mi></math>&nbsp;with molar weight of 80g is dissolved in a solvent having density of 0.4&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>g</mi><mi>m</mi><msup><mi>L</mi><mrow><mo>-</mo><mn>1</mn></mrow></msup></math>. Assuming no change in volume upon dissolution, the molality of a 3.2 molar solution is:</p>