A solution was made by dissolving 10.0g of a nonvolatile nonelectrolyte compound in 100.0g of water froze at -0.93C. What is the approximate molecular weight of the substance. (for water..kf=1.86C/m) (m is molality)

Question

A solution was made by dissolving 10.0g of a nonvolatile nonelectrolyte compound in 100.0g of water froze at -0.93C. What is the approximate molecular weight of the substance. (for water..kf=1.86C/m)  (m is molality)

DrBob222 · Answer

delta T = Kf*m Solve for m m = moles/kg solvent Solve for moles. moles = grams/molar mass Solve for molar mass.