Wiped Out

This page lists questions and answers that were posted by visitors named Wiped Out.

Questions

The following questions were asked by visitors named Wiped Out.

The concentrations of Ca and Na in a sample of river water are 13.4 mg/kg and 5.2 mg/kg. Express the concentration in molality

What is the mole ratio of benzene (C6H6) to n-octane in the vapor above a solution of 15.0% benzene and 85.0% n-octane by mass at 25 degrees Celcius? the vapor pressures of n-octane and benzene are 11 torr and 95 torr.

A solution was made by dissolving 5.15 mg of hemoglobin in water to give final volume of 1.00 mL. The osmotic pressure of this solution was 1.97 x 10^-3 atm at 25C. Calculate the molar mass of hemoglobin. pi = iMRT i = 1 since hemoglobin is nonelectrolyte...

Answers

The following answers were posted by visitors named Wiped Out.

here is what I did (check my work, because something isnt right): 15g C6H6/78.12gC6H6 = .19 mol C6H6 85g C8H18/114.26g C8H18= .74 mol C8H18 X-benzene: .19/.93= .204 X-octane: .74/.93= .796 pBen: .204*95=19.38 pOctane: .796*11=8.756 19.38+ 8.756= 28.136

The database said the answer was 2.23 ??