Question

(10 pts) A solution is made by dissolvine 200 g of glycerin (CH ), a nonvale nonelectrolyte, in water. The vapor pressure of the solution at 25 C is 20.5 tort. The vapor pressure of pure water at 25°C is 23.8 tort p solution SPA a Calculate the mole fraction of water. 100 Mele bach mole escre fractich Tutulmues 2501 +73 2a8 t/1555016 20.og saru 2015 terviso = 15580. muss percon of glycerin in an aqueous solution at 25 b. Calculate the mass ISODE 5. (10 pts) A certain compound undergoes first-order decay and has a half life of 0.619 days (a) (3pts) What is the rate constant, k, of this compound? 1.12 + y2 = 0.693 - 0.693 = 1.13035/day +Y2 = o.sessa = 1.13 schistent 16) (3pts) How much of a 9.50 M sample of this compound will remain after 1.50 days? Incast = httln caso Incast=14383 (1.stos (A ln49.50) Incast Incast Last = 1.64853 +2.25189 - 3.94982 -51.986 In cat -kettihlaso In (9.50m) - 1.1323561.59 tin (0.67 35 6) (4pts) How long will it take for a 9.50 M sample of this compound to decay to 0.673 M? ? t-

Answer 1

er nastor =0.86 4.2. Mode-theation of Water : 2015-0.86 : ? fforinth water : mal watch ont. Mass of Water = 21.82g. . Plan ay of the 20 ce *2251A

5.24 k = 0,693 -0.693 - 1.138 day tv 0619 s (1)(A),e*** 9.5848138215) = 1:72(m): I In 89.5 = 2326 In LAol [A] 7:138 In 20326 0.673 days

Fus 13) Osmotic Pressure - 04 Meer Coventration - ... Melore Moss M= xRT x= Amount of Sclute nur m ; Molar Mass of the Protein 30.92 vioº ko-082 229 (40111 760)

Molar Mass of the Protein = 136.55 g./mol