a concentrated potassium hydrocide solution is 45.0% KOH by mass and has a density of 1.44 g/mL at 25 C. The remainder of material is solvent. what is the molality of KOH in the solution

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm