Problem 1 You are asked to make a 1 L solution of 140 mM NaCl. What mass of NaCl would you add to the water? What is the mass density of this solution? How does this compare to the mass density of pure water?

Problem 2 You make three glucose/water mixtures to represent health, pre-diabetic, and diabetic samples. You use 95 mg/dL for normal, 110 mg/dL for pre-diabetic, and 130 mg/dL for diabetic. What are the mass densities and molar densities of these solutions?

Problem 3 Respired air on a cold day (0 C) at a barometric pressure of 105 kPa consists of nitrogen at 79% mole fraction and the remainder oxygen. Typical alveolar gas conditions are body temperature at a pressure of 96 kPa and composition of 76% nitrogen, 12% oxygen, 6% carbon dioxide, and 6% water vapor. What are the molar and mass density of the gases at these two conditions?