A 5 gram (NH4)2SO4 (MW = 132.14 g/mol) was dissolved to make 500mL solution. It found to have a density of 1.05 mL at 25 C. Find its concentration in: Molarity (M) = (A] Normality (N) = [(B] Molality (m) = [C)

when 7.94 g of xylene was added to 132.5 g of cyclohexane, the freezing point of the solution was -4.9 C. what is the molar mass of xylene?

Calculate the molality of a solution containing 130.6 g of glycine  (NH2CH2COOH)  dissolved in  1.502 kg of H2O.      m

(d) Determine the freezing point and boiling point of the solution. (Assume density of water = 1.00 g/mL; Kf= 1.86oC/m; Kb= 0.512oC/m; density of EG = 1.114 g/mL

What is the molality of a solution that is 15.0% by mass sodium chloride and that has a density of 1.10g / m * L ?

Pentane (C5H12) and hexane (C6H14) form ideal solution. At 25oC the vapor pressure of pentane and hexane are 511 torr and 150. torr, respectively. A solution is prepared by mixing 30.0mL pentane (density = 0.63g/mL) with 45.0mL hexane (density = 0.66 g/mL). (a) What are the mole fractions of pentane and hexane, respectively,in the solution? (b) What isthe total vapor pressure of the solution at 25oC? (c) What are the mole percent of pentane and hexane, respectively, in the vapor phase at 25oC? (Molar mass of pentane and hexane are: 72.15 g/mol and 86.17 g/mol, respectively.)

EJ0.939 M What is the vapor pressure of a 45.0 % solution of glucose, CH,,06, at a particular temperature, 12 6' given that the vapor pressure of pure water at that temperature is 486 mm Hg? 186 m m Ha

2. Calculate the molality of a solution prepared by dissolving 4.75 g of C10H8 (s) in 75.0 mL of CH6 (1) of density, 0.879 g/mL.