Chemistry Homework Help

Browse Homework Solutions

57 solutions

Mole Fraction

Q. A solution of isopropyl alcohol, C3H7OH, in water has a mole fraction of alcohol equal to 0.38. What is the weight per cent alcohol and the molality of the solution?

Solved • May 6, 2020

Mole Fraction

Q. A solution of isopropyl alcohol, C3H7OH, in water has a mole fraction of alcohol equal to 0.38. What is the weight per cent alcohol and the molality of the solution?

Solved • May 6, 2020

Mole Fraction

Q. Which of the following does not required any type of units? A. molarity B. molar mass C. molality D. mole fraction E. density

Solved • Apr 25, 2020

Mole Fraction

Q. What is the mole fraction of urea, CO(NH2)2, in a solution prepared by dissolving 5.6 g of urea in 30.1 g of methanol, CH3OH?

Solved • Mar 3, 2020

Mole Fraction

Q. The density of toluene (C7H8) is 0.867 g.mL, and the density of thiophene (C4H4S) is 0.065 g/mL. A solution is made by dissolving 8.10 g of thiophene in 270 mL of toluene. Calculate the mole fraction of thiophene in the solution.

Solved • Feb 7, 2020

Mole Fraction

Q. A 2.650x10^-2 M solution of glycerol (C3H8O3) in water is at 20.0°C. The sample was created by dissolving a sample of C3H8O3 in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed to do this was 998.9 mL. The density of water at 20.0°C is .09982 g/mL. Calculate the mole fraction of glycerol in this solution. Express the mole fraction to four significant figures.

Solved • Feb 7, 2020

Mole Fraction

Q. A solution was prepared by dissolving 31.0 g of KCl in 225 g of water. Calculate the mole fraction of the ionic species KCl in the solution. Express the concentration numerically as a mole fraction in decimal form.

Solved • Feb 7, 2020