Molality is the number of moles dissolved in one kilogram of solvent. m = n/kg of solvent n = mass of solute / molar mass of solute Acetone's chemical formula is C3H6O. Therefore, its molar mass = 12*3 + 6*1 + 1*16 = 58g = 0.058kg n = mass of solute / 0.058 We have the molality = 0.7500 and the mass of solution = mass of solvent + mass of solute = 450 g = 0.45 kg Therfore, mass of solvet = 0.45 - mass of solute 0.75 = n / 0.45 - mass of solute 0.75 = (mass of solute / 0.058) / (0.45 - mass of solute) Let mass of solute = x 0.75 = (x/0.058) / (0.45 - x) 0.3375 - 0.75x = x/0.058 x = 0.019575 - 0.0435x 1.0435x = 0.019575 x = 0.01875 kg mass of acetone = 0.01875 kg = 18.75 grams
Im assuming, if you find rare earth elements, it is important to the technological world bc you can make more products more better, and even invent new and more modern things.
