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Problem 3 The equation below gives the density in kg/L of formic acid (FA) as a function of FA weight fraction w in solution with in water at 0 C p=1+0.3w - 0.049w2 All questions below refer to () C. a) Mix 1 lbmol of formic acid with 2 lbmol of water. What is the volume of the solution in m?? b) What is average molecular weight of a solution with density 1.04 kg/L? c) What is the change of volume (in cm?) when pure formic acid is mixed with pure water to form 1 m of solution with FA weight fraction 0.75? The chemical formula of formic acid is HCOOH