This question has been answered
Question

11/ The concentration of O2 in seawater is 1.68 x 10-4 M at 25.0 °C.

What is this concentration in ppm? (assume the density of sea water = 1.00 g/mL)






12/ Some lake water is found to contain 548. ppm of methyl mercury, Hg(CH3)2. What is the concentration of methyl mercury in mass percent?






13/ 1.921 g of an organic compound is dissolved in 48.92 g of water. The aqueous solution starts to freeze at -0.450°C. What is the molar mass of the organic compound (in g/mol)?
Kf for water = 1.86 °C/m






14/ What is the freezing point (in °C) of a solution of 29.77 g methyl salicylate, C8H8O3, dissolved in 747.5 g of benzene, C6H6? The freezing point for benzene is 5.50°C. Kf for benzene is 5.10 °C/m.






15/ A solution is prepared by dissolving 49.08 g of sucrose, C12H22O11, in 250.0 g of water at 25°C. What is the vapor pressure of the solution (in mmHg) if the vapor pressure of water at 25°C is 23.76 mm Hg?




16/ Choose the aqueous solution below with the lowest freezing point. 


a. 0.075 m sodium periodate solution


b. 0.075 m sodium nitrite solution


c. 0.075 m potassium fluoride solution


d. 0.075 m ammonium phosphate solution


e. 0.075 m potassium cyanide solution

Answered by Expert Tutors
Step-by-step explanation
4 Attachments
WhatsApp Image 2020-11-16 at 18.00.13.jpeg
jpeg
WhatsApp Image 2020-11-16 at 18.08.33.jpeg
jpeg
WhatsApp Image 2020-11-16 at 18.08.43.jpeg
jpeg
WhatsApp Image 2020-11-16 at 18.13.32.jpeg
jpeg
The student who asked this found it Helpful
Overall rating 100%
Subject: Chemistry, Science
11/ The concentration of O2in seawater is 1.68 x 10-4M at 25.0 C. What is this concentration in ppm? (assume the density of sea water = 1.00 g/mL)
Get unstuck

252,291 students got unstuck by Course
Hero in the last week

step by step solutions

Our Expert Tutors provide step by step solutions to help you excel in your courses