Do they have a high enough concentration at the lowest recorded atmospheric pressure? What was the concentration in water at the lowest recorded atmospheric pressure when the partial pressure of oxygen was 0.18 atm? Fish need 1.56 x 10 -7 M O 2 in order to survive. The partial pressure of oxygen, O 2, at the highest recorded atmospheric pressure was 0.225 atm and the concentration in water under those conditions was 6.5 x 10 -5 M. What is the molecular weight of nandrolone? k f for CCl 4 is 29.8 ☌/m. A 20 g sample of nandrolone was placed in 500 mL of CCl 4 (density = 1.59 g/mL) and the freezing point of the solution was found to be 1.75 ☌ lower than the normal freezing point. Nandrolone is an anabolic steroid (a muscle-building chemical) which occurs naturally in the human body, but only in tiny quantities. The LiF solution will be next and the Ca(NO 3) 2 solution will have the lowest freezing point. The highest freezing point will be the solution with the smallest molality, which is sucrose. The larger the molality, the larger the ΔT and the lower the freezing point. ΔT f = k fm suggests that the change in freezing point is directly related to the molality of the particles in the solution. List the following aqueous solutions in the order of increasing freezing point: 0.5 m Ca(NO 3) 2, 0.8 m sucrose, 0.6 m LiF. How many liters of ethylene glycol, C 2H 6O 2, should be added to 3 L of water to make a solution that will freeze at -20 ☌ (-4 ☏)? The density of C 2H 6O 2 is 1.11 g/ml and the density of water is 1 g/ml. For benzene the boiling point elevation constant, k b, is 2.53 ☌/m and the freezing point depression constant, K f, is 5.12 ☌/m. What will the melting point and the boiling point be for a solution where 5 mL of hexane, C 6H 14, (density = 0.658 g/mL) is placed into 100 mL of benzene, C 6H 6 (density = 0.8765 g/mL)? The normal boiling point of benzene is 80.1 ☌ and the normal freezing point of benzene is 5.5 ☌. The total mass is 54.94 g plus 30 g or 84.94 g. To get the liters of solution we use the total mass and the density.
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