Use balances and not guesses based on stoichiometry. Two aqueous solutions of sulfuric acid containing 20 mass % (relative density 1.139) H2S04 and 60 mass % H2S04 (relative density 1.498) are mixed to form a 4 molar solution (relative density 1.213). a) Calculate the mass fraction of sulfuric acid in the product solution. b) Based on 100 kg of the 20% feed solution, draw and label the flow diagram of the process, marking masses and volumes and do the analysis of degrees of freedom. Calculate the proportion of feed (liters of 20% solution/liters of 60% solution). c) What feed rate of the 60% solution (L/h) would be required to give 1250 kg/h of product