Reference no: EM131840662

1.What is the molality of the 50.0 mass % ethylene glycol (C2H602) solution in the water used for automobile antifreeze?

2. A 2.400×10^-2M solution of NaCl in water is at 20.0°C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed was 999.4 mL. The density of water at 20.0°C is 0.9982 g/mL

a. Calculate the molality of the salt solution. to four sig figs

b. Calculate the mole fraction of salt in this solution. to four sig figs

c. Calculate the concentration of the salt solution in percent by mass. to four sig figs

d. Calculate the concentration of the salt solution in parts per million. - answer as an integer to four significant figures and include the appropriate units.

3. How many grams of a 1.5×10^-3 m aqueous solution of nalorphine are needed to obtain a dose of 1.7 mg? 2 sig figs