Molality
posted by Kyle .
An aqueous solution contains 8.7% NaCl by mass.
1. Calculate the molality of the solution.
2. Calculate the mole fraction of the solution.

assume 100 grams of the solution.
you have 8.7 g of NaCl, figure the moles
You have 91.3 g of water, figure the moles
calculate the mole fraction.
molality=molesNaCl/kgsolvent
and you have .1 kg solvent. 
1.49 m
Respond to this Question
Similar Questions

Chemistry
An aqueous solution contains 2.0 % NaCl by mass. (1) Calculate the molality (NOT molarity!) of the solution. (2) Calculate the mole fraction of the solution. I know how to solve both but the problem is missing one other compound/element. … 
Chemistry
An aqueous solution contains 2.6 %NaCl by mass. Calculate the molality of the solution. 
Chemistry
A solution contains 40.0 g of sodium chloride and 200.0 g of water. Calculate the NaCl concentration as a a) mass percentage, b) molality, c) mole fraction. I have trouble finding mole fraction. I believe I've got the other two, but … 
Chemistry
What are the molality and mole fraction of solute in a 32.3 percent by mass aqueous solution of methanol (CH3OH)? 
science
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. 
science
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. 
college chemistry
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. 
chemistry
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. whats wrong 25 g NaCl 1.0 … 
chemistry
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. help please 25g/58.44g NaCl=.428 … 
chemistry
A 2.500×10−2M solution of NaCl in water is at 20.0∘C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed to do this …