# chemistry

Which of the following can be determined if the boiling-point elevation, the mass of solute and the molality of a given solution are known.

The identity of the solute
The polarity of the solute
The size of a molecule of the solute The molecular weight of the solute

My answer: the molecular weight of solute
Reason: m= (mass of solute/M.M. solute)/(kg solvent)
But- I don't know how I'd be able to get the mass of the solvent. Is it possible for me to assume the solvent to be 1 L and convert that to kg?

1. 👍 0
2. 👎 0
3. 👁 111
1. I think molar mass is the right answer. No, you may not assume the solvent is 1 L and that the density is 1 kg; however, you can assume you have a kg of solvent, that will tell you the moles of solute. And if the delta T is known, the problem must tell you, also, the mass of the solvent. Or if this is a problem and you are trying to work it in parts and you have posted just pieces of the problem, I suggest you post the entire problem as a new post.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Chemistry

The boiling point of a solution increases directly as a function of the number of moles of solute present in a given mass of solution. This relationship is expressed mathematically by the following equation. ΔTb = Kb·m ΔTb is

asked by Anne on January 16, 2018
2. ### chemistry

1. A 2.00 g sample of a particular compound was dissolved in 15.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85ºC. For pure CCl4, TB = 76.50ºC and KB = 5.03°C·kg/mol Calculate the

asked by sarah on May 4, 2014
3. ### Chemistry

Pure water boils at 100ºC (212ºF). When a substance is added to the water the boiling point increases due to what is referred to as the boiling point elevation. (a) What is the molecular mass of sucrose (C₁₂H₂₂O₁₁)?

asked by Hannah on March 18, 2012
4. ### Chemistry

Calculate the boiling point elevation of a solution made from 15.0 g of a nonelectrolyte solute and 250.0 g of water. the molar mass of the solute is 50.0 g and Kb = 0.51 degrees C/m

asked by Christina on June 7, 2010
5. ### Chemistry

Mass of flask = 81.39g Mass of flask and water = 104.26g Mass of flask ,water,and solute =129.53 Mass of solute= 25.27g Boiling point of water =98.7C Boiling point of solution =109.5C Calculate the molecular weight of the solute

asked by Tim on January 10, 2011
6. ### Chemistry

1) The molecular mass of a substance was determined by the freezing point depression technique. The minimum data required for the determination are a. ƒ´Tf and Kf only. b. ƒ´Tf , Kf and mass of solute. c. ƒ´Tf , Kf , mass of

asked by Hannah on February 13, 2012
7. ### chemistry

A compound was found to be composed of the following amounts of elements: 20.00% wt% C, 26.64wt% O, 46.65 wt%N, and 6.71wt%H. A 6.125 grams sample of this compound dissolved in 46.205 grams of water as a solution was found to have

asked by lucy on April 25, 2013
8. ### chemistry

Okay so I know how I would normally determine molar mass of a compound *get out periodic table, sum up elements present, eg. H20 = [2(1.008)+16.00]g/mol* But this is for a lab class and they want us to derive it. Info found:

asked by determining molar mass on July 11, 2011
9. ### Chemistry

The boiling point elevation of a solution consisting of 2.92 g of a nonvolatile solute in 82.4 g of benzene is 1.077 oC. What is the molecular weight of the unknown solute?

asked by Jacqueline on October 27, 2008